阅读说明：本技术 用于放大小电流的放大器装置 (Amplifier arrangement for amplifying a current ) 是由 诺伯特·罗夫 于 2020-03-06 设计创作，主要内容包括：一种用于接收电流的放大器装置,其包括用于测量小于100皮安的较小电流的第一电流路径、包括在第一电流路径中的输入放大器装置(50),该放大器装置(50)具有至少一个第一放大器(1)、输出端、反相输入端(30)、将输出端连接到反相输入端(30)的第一反馈路径(41)、以及包括在第一反馈路径(41)中的反馈元件(2),其中第一放大器(1)具有在至少一个保护元件(18、19、20、21),第二电流路径,其用于测量最大电流为第一电流路径中接收的电流的至少10倍的较大电流,其特征在于,至少一个放大器(1)的保护元件(18、19、20、21)是第二电流路径的一部分。(Amplifier device for receiving a current, comprising a first current path for measuring a small current of less than 100 pico amperes, an input amplifier device (50) comprised in the first current path, the amplifier arrangement (50) has at least one first amplifier (1), an output, an inverting input (30), a first feedback path (41) connecting the output to the inverting input (30), and a feedback element (2) comprised in the first feedback path (41), wherein the first amplifier (1) has at least one protection element (18, 19, 20, 21), a second current path, for measuring a larger current having a maximum current of at least 10 times the current received in the first current path, characterized in that the protection element (18, 19, 20, 21) of at least one amplifier (1) is part of the second current path.)

1. An amplifier arrangement for receiving current, comprising

A first current path for measuring a small current of less than 100 pico amperes;

an input amplifier device (50) included in the first current path, the input amplifier device (50) comprising:

at least one first amplifier (1);

an output end;

an inverting input (30);

a first feedback path (41), the first feedback path (41) connecting the output to the inverting input (30); and

a feedback element (2) comprised in the first feedback path (41);

wherein the first amplifier (1) has at least one protective element (18, 19, 20, 21),

a second current path for measuring a larger current with a maximum current of at least 10 times the current received in the first current path,

it is characterized in that the preparation method is characterized in that,

at least one of the protection elements (18, 19, 20, 21) of the input amplifier device (50) is part of the second current path.

2. An amplifier arrangement as claimed in claim 1, characterized in that a supply voltage of the first amplifier (1) is applied to at least one of the protection elements (18, 19, 20, 21).

3. Amplifier arrangement according to any of the preceding claims, characterized in that at least one of the protection elements (18, 19, 20, 21) is arranged between and connected to both inputs (30, 31) of the first amplifier (1).

4. Amplifier arrangement according to any of the preceding claims, characterized in that the feedback element (2) in the first feedback path (41) is a resistor.

5. An amplifier arrangement as claimed in any one of the preceding claims, characterized in that the feedback component (2) in the first feedback path (41) is a capacitance.

6. An amplifier arrangement as claimed in any one of the preceding claims, characterized in that the input amplifier arrangement (50) comprises at least one further amplifier (3) forming a control loop with the first amplifier (1).

7. Amplifier arrangement according to any of the preceding claims, characterized in that at least one of the two power supply connections (32, 33) of the first amplifier (1) is connected to the output of the first amplifier (1) via a resistor (6a, 6 b).

8. An amplifier arrangement as claimed in any one of the preceding claims, characterized in that the feedback path (41) connects the output of the last amplifier of the input amplifier arrangement (50) consisting of the first amplifier (1) and the at least one further amplifier (3) to the inverting input (30) of the input amplifier arrangement (50).

9. Amplifier arrangement according to any of the preceding claims, characterized in that the negative supply connection (33) of the first amplifier (1) is selectively connected to a negative supply voltage (14) or to ground via a first switch (10), while the positive supply connection (32) of the first amplifier (1) is conductively connected to an inverting connection (38) of a third amplifier (7), the non-inverting input (37) of the third amplifier (7) being selectively connected to a positive supply voltage (15) or to ground via a second switch (11).

10. Amplifier arrangement according to any of the preceding claims, characterized in that the third amplifier (7) comprises a second feedback path (43) with a resistor (8) and a diode (9), the diode (9) being arranged in parallel with the resistor (8) and being conducting in the direction from the output (17) of the third amplifier to the positive supply connection (32) of the first amplifier (1) and being blocking in the opposite direction.

11. Amplifier arrangement according to any of the preceding claims, characterized in that the first feedback path (41) is selectively connected via a third switch (12) to a voltage avoiding or allowing a current to flow in the feedback element (2) based on the switch position.

12. Amplifier arrangement according to any of the preceding claims, characterized in that the ground reference of the switches (10, 11) and the reference voltage (22) are varied by the forward voltage of the protection element (18).

13. Amplifier arrangement according to any of the preceding claims, characterized in that the second feedback path (43) comprises two diodes (9a, 9b), a resistor (39) being led out between the two diodes (9a, 9b) with respect to the switch (11).

14. A gas detector, comprising: mass spectrometry sensors or total pressure sensors; and an amplifier arrangement according to any one of the preceding claims.

15. A method for measuring current using an amplifier arrangement according to any one of claims 1-13, characterized in that the first current path is switched to the second current path by grounding the negative supply connection (33) of the first amplifier (1).

16. Method according to the preceding claim, characterized in that for switching the current path, the inverting input of a third amplifier (7) is connected to the positive supply connection (32) of the first amplifier (1), the non-inverting input of the third amplifier (7) being additionally connected to ground.