FIELD: radio engineering.
SUBSTANCE: resistor (R3) and controlled switching element (K1) are introduced to control circuit filter (CCF) diagram containing operating amplifier OA (1), capacitor (C1) and resistors (R1) and (R2). When switching element (K1) is closed, multiple increase in recharge current flowing through capacitor (C 1) occurs, and thus, increase in speed of voltage turning to CCF is provided. Due to the fact that some portion of resistance (R1) and (R2) is transferred to R3 the total value of resistors and CCF surface area occupied on the microcircuit chip is proportionally decreased.
EFFECT: reducing the time of transient process in circuit of phase automatic frequency control owing to quick voltage tuning on control circuit filter, and reduction of surface area occupied with control circuit filter on microcircuit chip in case of fully integral implementation.
4 dwg
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