阅读说明：本技术 一种模数转换电路及具有模数转换功能的电视信号转换器 (Analog-to-digital conversion circuit and television signal converter with analog-to-digital conversion function ) 是由 徐明森 张宠 周星 于 2021-07-08 设计创作，主要内容包括：本发明公开一种模数转换电路,包括若干个模拟信号输入端、若干个模拟信号输出端和若干个dcss输出端；其中模拟信号输入端与模拟信号输出端通过模拟信号传输电路连接；模拟信号输入端连接模数集成电路芯片,模数集成电路芯片连接dcss输出端。一种具有模数转换功能的电视信号转换器,包括外壳、电路板、若干个模拟信号输入接头、若干个模拟信号输出接头和若干个dcss输出接头,电路板上设置有模数转换电路；电路板设置在外壳内部,模拟信号输入接头、模拟信号输出接头和dcss输出接头设置在外壳外部,三类接头分别与内部的电路板相连接。该电路以及转换器具有同时输出模拟信号和数字信号的特点。(The invention discloses an analog-digital conversion circuit, which comprises a plurality of analog signal input ends, a plurality of analog signal output ends and a plurality of dcs output ends; the analog signal input end is connected with the analog signal output end through an analog signal transmission circuit; the analog signal input end is connected with the analog-digital integrated circuit chip, and the analog-digital integrated circuit chip is connected with the dcs output end. A television signal converter with analog-to-digital conversion function comprises a shell, a circuit board, a plurality of analog signal input connectors, a plurality of analog signal output connectors and a plurality of dcs output connectors, wherein an analog-to-digital conversion circuit is arranged on the circuit board; the circuit board is arranged inside the shell, the analog signal input connector, the analog signal output connector and the dcs output connector are arranged outside the shell, and the three connectors are respectively connected with the circuit board inside. The circuit and the converter have the characteristic of simultaneously outputting an analog signal and a digital signal.)

1. An analog-to-digital conversion circuit, characterized by: the device comprises a plurality of analog signal input ends, a plurality of analog signal output ends and a plurality of dcs output ends; the analog signal input end is connected with the analog signal output end through an analog signal transmission circuit; the analog signal input end is connected with an analog-digital integrated circuit chip, and the analog-digital integrated circuit chip is connected with the dcs output end; the analog-digital integrated circuit chip is used for converting a plurality of analog signals into digital signals and superposing the digital signals in a plurality of frequency spectrum sections; the analog-digital integrated circuit chip is also respectively connected with the phase-locked loop circuit and the control storage chip; the analog-digital integrated circuit chip and the control storage chip are respectively connected with a voltage-stabilizing power circuit which provides power for the analog-digital integrated circuit chip and the control storage chip; the voltage stabilizing circuit is connected with the output end of the dcs.

2. The analog-to-digital conversion circuit of claim 1, wherein: the number of the analog signal input ends is four, and the analog signal input ends are respectively an HH input end, a VH input end, an HL input end and a VL input end; the analog signal output ends are set to be four paths, namely an HH output end, a VH output end, an HL output end and a VL output end; the HH input end is correspondingly connected with the HH output end, the VH input end is correspondingly connected with the VH output end, the HL input end is correspondingly connected with the HL output end, and the VL input end is correspondingly connected with the VL output end; the dcs output is set to one.

3. An analog-to-digital conversion circuit according to claim 2, characterized in that: the analog-digital integrated circuit chip is used for converting four paths of analog signals input from four analog signal input ends into one path of digital signal and superposing the digital signal in sixteen frequency spectrum sections.

4. An analog-to-digital conversion circuit according to claim 3, characterized in that: each spectrum segment contains all of the frequency bands of the four analog signals.

5. A television signal converter having analog to digital conversion, comprising: the analog-digital conversion circuit comprises a shell, a circuit board, a plurality of analog signal input connectors, a plurality of analog signal output connectors and a plurality of dcs output connectors, wherein the circuit board is provided with the analog-digital conversion circuit as claimed in any one of claims 1 to 4; the circuit board is arranged inside the shell, the analog signal input connector, the analog signal output connector and the dcs output connector are arranged outside the shell, and the three connectors are respectively connected with the circuit board inside.

6. The television signal converter with analog-to-digital conversion function of claim 5, wherein: the analog signal input joint is connected with an analog signal input end on the analog-to-digital conversion circuit; the analog signal output joint is connected with an analog signal output end on the analog-to-digital conversion circuit; the dcss output connector is connected with a dcss output end on the analog-to-digital conversion circuit.

7. A television signal converter having analog-to-digital conversion capability according to claim 5 or 6, wherein: the number of the analog signal input connectors is four, the number of the analog signal output connectors is four, and the number of the dcs output connectors is one; the four analog signal input joints are respectively an HH input joint, a VH input joint, an HL input joint and a VL input joint; the four analog signal output terminals 20 are an HH output terminal, a VH output terminal, an HL output terminal, and a VL output terminal, respectively.

8. A television signal converter having analog-to-digital conversion capability according to claim 7, wherein: the analog signal input connector, the analog signal output connector and the dcs output connector are all F-shaped connectors with transmission impedance of 75 ohms.

9. The television signal converter with analog-to-digital conversion function of claim 5, wherein: the circuit board is a copper-clad etched multilayer circuit board.

Technical Field

The present invention relates to satellite television receiving technologies, and in particular, to an analog-to-digital conversion circuit and a television signal converter having an analog-to-digital conversion function.

Background

With the advancement of communication technology, digital signals are widely used in various fields. For example, in the television field, analog television signals have been replaced by digital television signals, which are the primary form of television signals. At present, a satellite television signal multiplexer can only singly tap an analog signal output by a high-frequency tuner or a digital signal output by the high-frequency tuner, and can not tap an analog signal to output while converting the analog signal output by the high-frequency tuner into a digital signal to output; therefore, there is a need to improve the function of the existing multiplexer to improve the practical effect and applicability of the tuner.

In view of the foregoing problems, the present invention provides an analog-to-digital conversion circuit and a television signal converter having an analog-to-digital conversion function.

Disclosure of Invention

The invention provides an analog-to-digital conversion circuit and a television signal converter with an analog-to-digital conversion function, wherein the circuit and the converter have the characteristic of simultaneously outputting an analog signal and a digital signal; specifically, the invention is realized by the following technical scheme:

an analog-to-digital conversion circuit comprises a plurality of analog signal input ends, a plurality of analog signal output ends and a plurality of dcs output ends (digital signal output ends); the analog signal input end is connected with the analog signal output end through an analog signal transmission circuit; the analog signal input end is connected with the analog-digital integrated circuit chip, and the analog-digital integrated circuit chip is connected with the dcs output end.

Through the structural layout, the analog signal at the input end is transmitted to the analog signal output end through the analog signal transmission circuit and is output, so that the transmission of the analog signal is realized; meanwhile, the analog signal is converted into a digital signal through an analog-digital integrated circuit chip and is transmitted out through a dcs output end, so that the digital signal is transmitted; thus, an analog signal and a digital signal can be simultaneously output by this configuration.

Furthermore, the analog-digital integrated circuit chip is used for converting a plurality of analog signals into a plurality of digital signals and simultaneously converting a plurality of digital signals in a plurality of frequency spectrum sections in a superposition manner.

Further, four analog signal input ends are set, namely an HH input end, a VH input end, an HL input end and a VL input end; the analog signal output ends are set to be four paths, namely an HH output end, a VH output end, an HL output end and a VL output end; the HH input end is correspondingly connected with the HH output end, the VH input end is correspondingly connected with the VH output end, the HL input end is correspondingly connected with the HL output end, and the VL input end is correspondingly connected with the VL output end; the dcs output is set to one.

Further, the analog-to-digital integrated circuit chip is used for converting four paths of analog signals input from four analog signal input ends into one path of digital signal and superposing the digital signal in sixteen frequency spectrum sections.

Further, each spectral segment contains all of the frequency bands of the four analog signals.

Four paths of analog signals are respectively accessed into the analog-digital integrated circuit chip from four analog signal input ends, analog signals are converted into digital signals in the analog-digital integrated circuit chip, four paths of digital signals are converted and overlapped in sixteen frequency spectrum sections, and finally the digital signals are transmitted to a dcs output end to be output, so that analog-digital conversion is completed; each frequency spectrum section can meet the condition that one user receives all frequency sections of four paths of analog signals; the real receiving performance of the tuner is improved.

Furthermore, the analog-digital integrated circuit chip is also respectively connected with the phase-locked loop circuit and the control storage chip; the analog-digital integrated circuit chip and the control storage chip are respectively connected with a voltage-stabilizing power circuit which provides power for the analog-digital integrated circuit chip and the control storage chip; the voltage stabilizing circuit is connected with the output end of the dcs.

A television signal converter with analog-to-digital conversion function comprises a shell, a circuit board, a plurality of analog signal input connectors, a plurality of analog signal output connectors and a plurality of dcs output connectors, wherein an analog-to-digital conversion circuit is arranged on the circuit board; the circuit board is arranged inside the shell, the analog signal input connector, the analog signal output connector and the dcs output connector are arranged outside the shell, and the three connectors are respectively connected with the circuit board inside.

The structure can realize the function of simultaneously outputting analog signals and digital signals.

Furthermore, the analog signal input joint is connected with an analog signal input end on the analog-to-digital conversion circuit; the analog signal output joint is connected with an analog signal output end on the analog-to-digital conversion circuit; the dcss output connector is connected with a dcss output end on the analog-to-digital conversion circuit.

Furthermore, the number of the analog signal input connectors is four, the number of the analog signal output connectors is four, and the number of the dcs output connectors is one; the four analog signal input joints are respectively an HH input joint, a VH input joint, an HL input joint and a VL input joint; the four analog signal output terminals 20 are an HH output terminal, a VH output terminal, an HL output terminal, and a VL output terminal, respectively.

Furthermore, the circuit board is a multi-layer circuit board coated with copper and etched.

By adopting the design structure of the multilayer circuit board, the insertion loss in the signal transmission process is reduced, the return loss and the isolation of multiple paths of signals are optimized, the structure is simple, the production is convenient, and the cost is greatly reduced.

Furthermore, the analog signal input connector, the analog signal output connector and the dcs output connector are all F-type connectors with transmission impedance of 75 ohms.

Drawings

Fig. 1 is a schematic diagram of an embodiment of a television signal converter according to the present invention;

fig. 2 is a schematic diagram of an embodiment of an analog-to-digital conversion circuit according to the present invention.

Wherein: an HH input; a VH input; an HL input end; a VL input; 5, a dcs output; 6, a VL output end; 7, an HL output end; a VH output end; an HH output; 10. an analog signal input terminal; 11. an analog signal output terminal; 12. an analog signal transmission circuit; 13. an analog-to-digital integrated circuit chip; a dcs output connector; 15. a phase-locked loop circuit; 16. controlling the storage chip; 17. a regulated power supply circuit; 18. a housing; 19. an analog signal input terminal; 20. and an analog signal output connector.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

As shown in fig. 1, a television signal converter with analog-to-digital conversion function includes a housing 18, a circuit board, a plurality of analog signal input connectors 19, a plurality of analog signal output connectors 20, and a plurality of dcs output connectors 14, wherein the circuit board is disposed inside the housing 18, and an analog-to-digital conversion circuit is disposed on the circuit board; the analog signal input terminal 19, the analog signal output terminal 20 and the dcs output terminal 14 are disposed outside the housing 18, and the three types of terminals are connected to the internal circuit board, respectively.

The housing 18 is a rectangular metal box die-cast from a metal material and is fitted with a metal cover.

The circuit board is a copper-clad etched multilayer circuit board. The multilayer circuit board is 0.8-1.2 mm in thickness and is formed by etching a double-layer LNB33 board and a double-layer FR4 board to form a substrate with copper on two sides, and laminating the substrate from bottom to top.

By adopting the design structure of the multilayer circuit board, the insertion loss in the signal transmission process is reduced, the return loss and the isolation of multiple paths of signals are optimized, the structure is simple, the production is convenient, and the cost is greatly reduced.

The analog signal input terminal 18, the analog signal output terminal 19 and the dcs output terminal 14 are all F-type terminals with a transmission impedance of 75 ohms.

In the embodiment of the television signal converter with analog-to-digital conversion shown in fig. 1, the analog signal input terminals 19 are provided in four, which are an HH input terminal, a VH input terminal, an HL input terminal, and a VL input terminal; the analog signal output terminals 20 are provided in four, which are an HH output terminal, a VH output terminal, an HL output terminal, and a VL output terminal, respectively.

As shown in fig. 2, an analog-to-digital conversion circuit includes a plurality of analog signal input terminals 10, a plurality of analog signal output terminals 11, and a plurality of dcs output terminals 5; the analog signal input end 10 is connected with an analog signal input joint 19; the analog signal output end 11 is connected with an analog signal output connector 20; the dcs output terminal 5 is connected to a dcs output terminal 14.

The analog signal input end 10 is connected with the analog signal output end 11 through an analog signal transmission circuit 12, so that the output of an analog signal is realized; specifically, each analog signal input terminal 10 is connected to a corresponding analog signal output terminal 11.

In one embodiment, the analog signal input terminals 10 are set to four, which are the HH input terminal 1, the VH input terminal 2, the HL input terminal 3, and the VL input terminal 4; the analog signal output ends 11 are set to be four paths, namely an HH output end 9, a VH output end 8, an HL output end 7 and a VL output end 6;

the HH input end 1 is connected with the HH output end 9; the VH input end 2 is connected with the VH output end 8; the HL input end 3 is connected with the HL output end 7; VL input terminal 4 is connected to VL output terminal 6.

The analog signal output process is as follows: analog signals are input to four analog signal input terminals 10, and the analog signals are output from four corresponding analog signal output terminals 11 via analog signal transmission circuits 12.

The analog signal input end 10 is connected with an analog-digital integrated circuit chip 13, and the analog-digital integrated circuit chip 13 is connected with the dcs output end 5.

In one embodiment, the dcss output 5 is selectively set to one, and the analog-to-digital conversion process is as follows:

the four paths of analog signals are respectively accessed into an analog-digital integrated circuit chip 13 from four paths of analog signal input ends 10, analog signals are converted into digital signals in the analog-digital integrated circuit chip 13, the four paths of digital signals are converted and overlapped in sixteen frequency spectrum sections, and finally the four paths of digital signals are transmitted to a dcs output end 5 to be output, so that analog-digital conversion is completed; each frequency spectrum section can satisfy all frequency bands of four paths of analog signals received by one user.

The analog-digital integrated circuit chip 13 is also respectively connected with the phase-locked loop circuit 15 and the control storage chip 16; the analog-digital integrated circuit chip 13 and the control storage chip 16 are respectively connected with a stabilized voltage supply circuit 17, the stabilized voltage supply circuit 17 supplies power to the two, the stabilized voltage supply circuit 17 and the dcs output end 5, and current is input into the stabilized voltage supply circuit 17 through the dcs output end 5.

The above is the preferred embodiment of the present invention, and several other simple substitutions and modifications made on the premise of the inventive concept should be considered as falling into the protection scope of the present invention.