Amplifier amplitude limiting protection circuit and signal receiver

• Main Authors: LIU SHITOU, KUANG ZHONG
• Format: Patent
• Language: Chinese; English
• Published: 25.11.2022
• Subjects: AMPLIFIERS; BASIC ELECTRONIC CIRCUITRY; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

The utility model provides an amplifier amplitude limiting protection circuit and a signal receiver, and relates to the technical field of radio frequency. According to the application, the signal coupler is externally connected with the to-be-amplified signal, and the signal coupler transmits the to-be-amplified signal to the waveguide switch through the direct port and transmits the coupling signal of the to-be-amplified signal to the power detection circuit through the coupling port, so that the power detection circuit detects whether the input power of the to-be-amplified signal exceeds the power threshold value based on the coupling signal; when the power threshold value is not exceeded, the waveguide switch is controlled to transmit a signal to be amplified to the low-noise amplifier cascade circuit, or when the power threshold value is exceeded, the waveguide switch is controlled to transmit the signal to be amplified to the high-power load for bearing; therefore, when an existing amplitude limiter is