Precise frequency tracking circuit
The utility model relates to a precise frequency tracking circuit, which comprises a voltage stabilizing circuit, a voltage dividing and filtering limiter circuit, a differentiate proportion arithmetic circuit with high input resistance, a comparison circuit, an optical coupling isolation circuit wh...
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Main Authors | , , , , , , |
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Format | Patent |
Language | Chinese English |
Published |
01.09.2010
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Subjects | |
Online Access | Get full text |
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Summary: | The utility model relates to a precise frequency tracking circuit, which comprises a voltage stabilizing circuit, a voltage dividing and filtering limiter circuit, a differentiate proportion arithmetic circuit with high input resistance, a comparison circuit, an optical coupling isolation circuit which are connected; the voltage stabilizing circuit comprises capacitors (C3 and C4), a resistor R21 and a voltage stabilizing pipe Z1; the voltage dividing and filtering limiter circuit comprises resistors (R1, R2, R7, R8, R9 and R10), capacitors (C1 and C2), electrolytic capacitor E1 and diodes (D1 and D2); the voltage dividing circuit comprises the resistors (R1, R2, R7, R8, R9 and R10), the filtering limiter circuit comprises the capacitor C1 and the diodes (D1 and D2); the other filtering circuit comprises the capacitor C2 and the electrolytic capacitor E1; the differentiate proportion arithmetic circuit with high input resistance comprises resistors (R3, R4, R5, R6, R11, R12, R13, R14, R15 and R16) and operati |
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Bibliography: | Application Number: CN20092273755U |