Switched-capacitor frequency-to-voltage and voltage-to-frequency converters based on charge-balancing principle

Switched-capacitor frequency-to-voltage and voltage-to-frequency converters integrable onto a small chip area are developed. The conversion is insensitive to parasitic capacitances, capacitance ratio, offset voltages, and finite open-loop gains of op amps. Therefore, both converters allow accurate conversion over a wide dynamic range. The authors describe the circuit configurations, the principles of operation, and the experimental results obtained by breadboard converters.<>