Logarithmic detector
By introducing a DC feedback compensation unit and a temperature compensation module into the logarithmic detector, the problems of low output signal accuracy and trailing phenomenon are solved, the signal response speed and temperature stability are improved, and higher signal accuracy and consistency are achieved.
CN122178848APending Publication Date: 2026-06-09INST OF MICROELECTRONICS CHINESE ACAD OF SCI LTD
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Patent Information
- Application Number
- CN202610176469.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-06
- Publication Date
- 2026-06-09
AI Technical Summary
Technical Problem
Existing logarithmic detectors have low output signal accuracy and suffer from DC offset and tailing phenomena, which affect signal response speed and temperature stability.
Method used
The DC feedback compensation unit in the feedback loop module is used to perform negative feedback on the differential input signal to reduce the DC offset caused by the gain effect of the limiting amplifier, and the voltage signal is temperature compensated by the temperature compensation module to improve the accuracy of the output signal.
Benefits of technology
It significantly improves the output signal accuracy of the logarithmic detector, solves the problems of DC offset and tailing, and improves the signal response speed and temperature stability.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to the technical field of signal processing, and discloses a logarithmic detector, which comprises at least one feedback loop module, a plurality of rectifier modules, a filter module, a buffer module, a temperature compensation module and a band-gap reference module, the feedback loop module is used for amplifying an input differential input signal to obtain an amplified differential signal; the rectification module is used for converting the differential input signal and the amplified differential signal and outputting a current signal; the buffer module is used for performing level shift on the filtered voltage signal and then outputting a detection voltage; the temperature compensation module is used for performing temperature compensation on the detection voltage and then outputting an output signal; each feedback loop module comprises a preceding stage amplitude limiting amplification unit, two amplitude limiting amplification units and a direct current feedback compensation unit. The direct current feedback compensation unit performs negative feedback on the differential input signal, reduces direct current offset and improves the precision of the output signal; and the temperature compensation module performs temperature compensation on the voltage signal to improve the precision of the output signal.
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