Gating switch time sequence generating circuit in multi-channel infrared detector reading circuit

Abstract

The invention discloses a gating switch time sequence generating circuit in a multi-channel infrared detector reading circuit. The gating switch time sequence generating circuit only has one externalinput signal, namely, a clock signal INT. The gating switch time sequence generating circuit is divided into two parts, wherein the first part is an input code generating circuit which is controlled by a clock signal and used for generating an input code of a decoder; and the second part is a decoding circuit which is used for decoding the input code and successively outputting a gating signal. According to the circuit, only one external input clock signal INT is needed to output the control time sequence of the multi-channel gating switch in addition to a power supply VDD and a ground VSS, and the pulse width of the output signal can be controlled by the INT, that is, the single-channel gating time is controllable. According to the invention, the input signals are few, the structure is simple, the output signal can be controlled by the input signal, the complexity of the overall design of the reading circuit is reduced, and the realization of integration and intellectualization is more facilitated.

Description

technical field [0001] The invention relates to the technical field of mixed-signal integrated circuits, in particular to a gate switch sequence generation circuit in a multi-channel infrared detector readout circuit. Background technique [0002] In recent years, integrated circuits have continued to develop at a high speed, forming a new integrated circuit industry. At present, microelectronics technology marked by the development of integrated circuits is ubiquitous and has become the foundation of modern information society. With the increase of system integration and application requirements, more and more digital circuit modules and analog circuit modules are embedded in the same chip, which promotes the development of electronic equipment in the direction of miniaturization, low cost and high efficiency, and is widely used in Electronic communication, target detection and other fields. [0003] In mixed-signal integrated circuits, especially detector readout circuit...

AI Technical Summary

Problems solved by technology

Since the front end of the readout circuit is often an analog circuit, the first method requires the use of digital-analog mixed imitation in the overall circuit design, which increases the complexity of the work

At the same time, the circuit layout generated by the first method is often unreadable, and it is not easy to change the layout shape according to the requirements, which may cause interference of digital signals to output signals

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