Title:
LOGARITHMIC AMPLIFIER
Document Type and Number:
WIPO Patent Application WO/2020/155128
Kind Code:
A1
Abstract:
The embodiment of the present application provides a logarithmic amplifier, relating to the technical field of circuit, and being able to solve the problem of low signal detection accuracy caused by big system error of the logarithmic amplifier. The logarithmic amplifier comprises a cascade amplifier, a summing circuit and a gain amplification circuit. The cascade amplifier comprises a first amplifier and a second amplifier cascaded to the first amplifier. The gain amplification circuit is used for performing gain amplification to an input signal of the logarithmic amplifier so as to obtain a first signal, the gain of the gain amplification circuit being larger than 1. The first amplifier is used for amplifying the input signal so as to obtain a second signal. The second amplifier is used for amplifying the second signal so as to obtain a third signal. The summing circuit is used for summing the first signal, the second signal and the third signal. The embodiment of the present application is used for illustrating the voltage logarithmic amplifier.
Inventors:
LI XIAOBO (CN)
Application Number:
PCT/CN2019/074512
Publication Date:
August 06, 2020
Filing Date:
February 01, 2019
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
G06G7/24; H03F1/32
Foreign References:
| GB2219113A | 1989-11-29 | |||
| CN1035594A | 1989-09-13 | |||
| CN101771387A | 2010-07-07 | |||
| US5414313A | 1995-05-09 |
Attorney, Agent or Firm:
BEIJING ZBSD PATENT & TRADEMARK AGENT LTD. (CN)
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