SYNTHESIZER WITH SWITCHED BANDPASS PHASE-LOCKED LOOP RING Russian patent published in 2024 - IPC H03B5/24 

FIELD: radio engineering.

SUBSTANCE: used in modern radio receiving and radio transmitting devices of radio communication equipment. To do this, a second voltage follower is introduced into the switching circuit, the output of which is connected to the controlled output of the second switch, while the non-inverting input of the second voltage follower is connected to the second output of a broadband low end filter (BLEF). The inverting input of the second voltage follower is connected to its output; the connection point of the first capacitor and the first resistor is connected to a common bus, and the second output of a narrowband low end filter (NLEF) is connected to the output of the second switch.

EFFECT: increase in the speed of the synthesizer when adjusting the frequency of the output signal while maintaining phase stability, as well as a decrease in the power consumption of the device.

1 cl, 2 dwg