MOS tube resistor for signal amplification and biasing circuit of MOS tube resistor
A MOS tube and signal amplification technology, which is applied in the direction of adjusting electrical variables, instruments, control/regulation systems, etc., can solve the problems of circuit oscillation, bulky size, and large power consumption, and achieve low harmonic distortion, small size, and low power consumption. consumption effect
Active Publication Date: 2021-09-07
TSINGHUA UNIV
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Problems solved by technology
The traditional extremely weak current signal amplification and detection circuit is composed of various discrete devices or devices. It has large volume, high power consumption, high noise, and low precision. It is not suitable for high precision, changeable and complex, and requires long-term online operation and monitoring. scene application
However, when using integrated circuit on-chip resistors to directly realize resistances of more than ten megaohms, a large amount of interference noise will be introduced due to the influence of parasitic parameters, and even circuit oscillation will be caused.
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[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0041] combine figure 1 , 2 As shown, the MOS tube resistance circuit for signal amplification in the embodiment of the present invention includes a cascode current mirror control circuit and a MOS tube group connected to the cascode current mirror control circuit; The gate current mirror control circuit includes a plurality...
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The invention discloses an MOS tube resistor for signal amplification and a biasing circuit of the MOS tube resistor. The MOS tube resistor circuit comprises a cascode current mirror control circuit and an MOS tube group connected with the cascode current mirror control circuit. The cascode current mirror control circuit comprises a plurality of transistors, the MOS tube group comprises a P-channel PMOS tube and an N-channel NMOS tube, the source electrode of the PMOS tube is connected with the source electrode of the NMOS tube, the grid electrode and the drain electrode of the PMOS tube are connected with one section of mirror image branch in the cascode current mirror control circuit, and the grid electrode and the drain electrode of the NMOS tube are connected with the other section of mirror image branch in the cascode current mirror control circuit. Compared with other solutions, the MOS tube has the advantages of high transimpedance gain multiple, high precision, high linearity, low noise, low power consumption, small volume and the like.
Description
technical field [0001] The invention belongs to the field of integrated circuits, in particular to a MOS transistor resistance circuit for signal amplification. Background technique [0002] In some signal networks including miniature sensors, miniature detectors and precision instruments, because the current signals output by some devices are extremely weak, the applications are extensive and the environment is complex, requiring miniature, high transimpedance gain multiples, high precision, and high linearity dedicated signal amplification processing circuit. The traditional extremely weak current signal amplification and detection circuit is composed of various discrete devices or devices. It has large volume, high power consumption, high noise, and low precision. It is not suitable for high precision, changeable and complex, and requires long-term online operation and monitoring. scene application. However, when the on-chip resistor of the integrated circuit is used to...
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IPC IPC(8): G05F3/26
CPCG05F3/26
Inventor 余占清张伟牟亚陈世萍严鑫
Owner TSINGHUA UNIV