Narrow-pulse peak sampling hold circuit

Abstract

The invention discloses a narrow-pulse peak sampling hold circuit. The narrow-pulse peak sampling hold circuit is characterized in that a narrow pulse IN is detected by a high-precision peak detectionmodule and is input into a point A through a first switch K1 controlled by the high-precision peak detection module, the point A is grounded through a first capacitor, and meanwhile, the output voltage OUT is taken as final output sampling hold voltage after a signal of the point A passes through a total operational amplifier OP; after the high-precision peak detection module detects the peak voltage of the narrow pulse IN, the first switch K1 is controlled to be disconnected, so that the peak voltage is held at the point A. According to the narrow-pulse peak sampling hold circuit, a method of presetting a second gain stage static working point of a comparator through the local negative feedback is provided, so that a problem that a traditional peak hold circuit cannot hold a peak value of a small-amplitude narrow-pulse signal or hold a lower peak voltage value is solved, and the loss of the held voltage peak is smaller.

Description

technical field [0001] The invention relates to an analog integrated circuit technology, in particular to a monolithic integrated narrow pulse peak holding circuit. Background technique [0002] The high precision of laser guidance can greatly improve the throwing accuracy and hit rate of tactical weapons. In laser guidance, processing the echo signal received by the detector is a key technical link. The laser guidance signal processing circuit is used to pre-process the electrical signal output by the optical detection component, and complete the identification, amplification, retention and digital conversion of the detection signal. When the detected target is far away from the laser transmitter, the echo signal is weak, and the electrical signal output by the photodetector is also very weak, which is only a narrow pulse with a small amplitude in the order of ns, and it is difficult for high-speed AD to capture the narrow pulse. Therefore, it is necessary to design a pea...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a monolithic integrated narrow pulse peak hold circuit based on a standard CMOS process, which solves the problem of the traditional peak hold circuit by presetting the static operating point of the comparator second gain stage through local negative feedback. The problem of being unable to maintain the peak value of a small-amplitude narrow pulse signal or keep the peak voltage value low

Images