On-chip Hall Signal Amplifier and Method Based on Chopper Second-Order Compensation

A Hall signal, second-order compensation technology, applied in amplifiers, amplifiers with semiconductor devices/discharge tubes, improving amplifiers to reduce temperature/power supply voltage changes, etc. Good and other problems, to achieve the effect of cost increase and linearity improvement
CN107093989BActive Publication Date: 2020-12-15NINGBO CRRC TIMES TRANSDUCER TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NINGBO CRRC TIMES TRANSDUCER TECH CO LTD
Publication Date
2020-12-15

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Abstract

An on-chip Hall signal amplifier based on chopper second-order compensation, comprising: a signal input module for providing a Hall non-inverting input signal and an inverting input signal; a chopper connected to two output terminals of the signal input module A wave modulation module, configured to modulate and output the positive-phase input signal and the reverse-phase input signal; a clock module, used to provide switching frequency and modulation frequency for the chopping modulation module; and the chopping modulation module The op-amp module connected to the two output terminals is used to amplify the output signal of the chopper modulation module; it also includes a second-order compensation module connected to the output terminal of the op-amp module and a clock module, which is used to adjust the op-amp The output signal of the module is compensated and fed back to the inverting input terminal of the operational amplifier module. Compared with the prior art, the invention can effectively eliminate the offset in the whole temperature range, and improve the linearity of the output signal through the second-order compensation.
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Description

technical field

[0001] The invention relates to the field of signal amplification, in particular to an on-chip Hall signal amplifier based on chopper second-order compensation and methods for eliminating offset and linear compensation. Background technique

[0002] In the design of integrated circuits, there are often problems such as operational amplifier misalignment, excessive voltage, excessive temperature drift of devices, and poor linearity characteristics during small signal amplification.

[0003] In order to solve the above problems, technicians often need to do zero drift, temperature drift elimination, and linearity compensation for the signal conditioning amplifier circuit. The problem is that the characteristics of the tubes at the forward and reverse ends of the operational amplifier are inconsistent, and the voltage is out of balance during static operation. If the silicon-based Hall signal is directly amplified, the weak signal is easily overwhelmed by the of...

Claims

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