Other

Daniel J Paslawski

Frederick N Trofimenkoff

Chun O Li

A clock-controlled voltage-to-frequency converter comprising a reference voltage source, an integrator for receiving the reference voltage and a variable input voltage and producing an output having a triangular waveform, the integrator including a capacitor which is charged at a rate proportional to the input voltage and discharged at a rate proportional to the difference between the reference voltage and the input voltage, the charging and discharging occurring during a time interval T.sub.o, a clock pulse source for generating a continuous series of clock pulses, a counter responsive to the clock pulses for terminating the discharging of the capacitor and initiating the charging of the capacitor at a fixed time interval following termination of the charging of the capacitor, a logic circuit responsive to the output of the integrator for terminating the charging of the capacitor and initiating the discharging of the capacitor when the integrator output rises above a preselected threshold level, the time required for the capacitor to charge to the threshold level varying in accordance with the magnitude of the input voltage.

Clock-controlled voltage-to-frequency converter

A clock-controlled pulse width modulator comprising an integrator for receiving a variable input voltage and producing an output having a triangular waveform, the integrator including a capacitor which is charged at a rate proportioal to the input voltage and discharged at a rate proportional to the difference between a reference voltage and the input voltage, the charging and discharging occurring during a time interval T.sub.o, a clock pulse source for generating a continuous series of clock pulses, a counter receiving the clock pulses and producing a binary control signal which changes state in response to the counting of a preselected number of clock pulses, the control signal having a period T.sub.o, and control means for terminating the charging of the capacitor and initiating the discharging of the capacitor in response to the first clock pulse following a selected transition in the control signal, and means for terminating the discharging of the capacitor and initiating the charging of the capacitor in response to the first clock pulse following the discharge of the capacitor to a preselected threshold level.

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Calgary, Canada

Daniel J Paslawski