SYNTHESIZER WITH SWITCHED PASS BAND OF PHASE-LOCKED LOOP Russian patent published in 2024 - IPC H03B5/24 

FIELD: radio engineering.

SUBSTANCE: device relates to radio engineering and can be used in modern radio receiving and radio transmitting devices of radio communication equipment. Synthesizer switching circuit (10) includes fourth key (Kl4), controlled output of which is connected to the controlled output of third key (Kl3) and to the second output of broadband low-pass filter (BLF) (8), in which the output of the first resistor (R1) is connected to the first output of the BLF, and the output of second capacitor (C1) is connected to common bus. In addition, the output of the fourth switch is connected to the second output of the low-pass filter, in which the output of the second resistor (R2) is connected to the first output of the NLF, and output of fourth capacitor (C4) is with common bus; controlled output of the third switch (Kl3) is connected to the input of voltage-controlled generator (5).

EFFECT: faster operation of the synthesizer when adjusting the frequency of the output signal while maintaining phase stability, as well as reduced power consumption and simplification of the device.

1 cl, 2 dwg