Trans-impedance amplifier circuit

A technology of transimpedance amplifiers and amplifiers, applied in amplifiers, differential amplifiers, amplifiers controlled by light, etc., can solve the problems of noise reduction performance, circuit complexity, power supply voltage increase, etc., and achieve low circuit complexity, low common mode gain, Effect of Low Supply Voltage
CN110546883APending Publication Date: 2019-12-06シコヤゲーエムベーハー
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
シコヤゲーエムベーハー
Publication Date
2019-12-06

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Abstract

The invention relates to a circuit containing a trans-impedance amplifier for converting two input currents into two output voltages, having a first amplifier part containing a first input, to which afirst input voltage is applied, and into which a first input current flows, and having a second amplifier part containing a second input, to which a second input voltage is applied and into which a second input current flows, wherein the first amplifier part and the second amplifier part are connected to a common supply voltage, the first amplifier part and the second amplifier part are connectedto a common current source, the input of the first amplifier part and the input of the second amplifier part have a differing direct voltage, and the first amplifier part and the second amplifier part are designed such that an output voltage of the first amplifier part is proportional to the input current of the first amplifier part and an output voltage of the second amplifier part is proportional to an input current of the second amplifier part.
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Description

technical field

[0001] The invention relates to a circuit comprising a transimpedance amplifier for converting two input currents into two output voltages, said circuit comprising a first input to which a first input voltage is applied and to which a first input current flows. A first amplifier component, and including a second amplifier component including a second input to which a second input voltage is applied and into which a second input current flows. Background technique

[0002] Transimpedance amplifiers are used in particular to convert an input current signal into an output voltage signal. The input current signal may eg be the current of a photodiode. The transimpedance amplifier receives the current signal output by the photodiode, converts the current signal into a corresponding voltage signal, and outputs the voltage signal. The voltage signal can optionally be amplified by means of an amplifier.

[0003] US 5 345 073 A discloses a circuit comprising a tran...

Claims

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