RADIO FREQUENCY SWITCH BIAS VOLTAGE FEEDBACK CONTROL CIRCUIT

• Main Authors: GUO, Jiashuai, SU, Junhua
• Format: Patent
• Language: Chinese; English; French
• Published: 27.04.2023
• Subjects: BASIC ELECTRONIC CIRCUITRY; CONTROLLING; ELECTRICITY; PHYSICS; PULSE TECHNIQUE; REGULATING; SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES

A radio frequency switch bias voltage feedback control circuit (100), comprising a frequency-adjustable oscillator (1), a charge pump (2), a level detection circuit (3) and a decoding circuit (4) connected in sequence. The decoding circuit (4) is further connected to the frequency-adjustable oscillator (1); the frequency-adjustable oscillator (1) is used to generate, according to a received frequency control signal, a clock signal the frequency of which corresponds to the frequency control signal and to output same; the charge pump (2) is used to generate, according to the clock signal, N multiples of a switch bias level from an externally inputted reference level and to output same, wherein N>1; the level detection circuit (3) is used to compare the received switch bias level with a preset reference level and to generate and output a bias level state indication signal; and the decoding circuit (4) is used to sequentially set a frequency, perform decoding according to the received bias level state indication