Logarithmic Power Detector

• Main Authors: DAI JUNHAN, JIAN HUIQING
• Format: Patent
• Language: Chinese; English
• Published: 05.03.2021
• Subjects: AMPLIFIERS; BASIC ELECTRONIC CIRCUITRY; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

A logarithmic power detector includes a power distributor, a first detection circuit, a second detection circuit and an output circuit. The power distributor is used to generate a first power signal and a second power signal according to an input signal. The first detection circuit is used to attenuate the first power signal to generate a first rectified signal, filter the first rectified signal to generate a first low-pass signal, and amplify the first low-pass signal to generate a first amplification current. The second detection circuit is used to attenuate the second power signal to generate a second rectified signal, filter the second rectified signal to generate a second low-pass signal, and amplify the second low-pass signal to generate a second amplification current. The output circuit is used to receive the first amplification current and the second amplification current to generate a converted voltage related to the input signal. 对数功率侦测器包含功率分配器、第一侦测电路、第二侦测电路及输出电路。功率分配器用以依据输入信号产生第一功率信号及第二功率信号。第一侦测电路用