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Amplitude to Pulse Rate Converter

IP.com Disclosure Number: IPCOM000096726D
Original Publication Date: 1963-Oct-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Bares, WA: AUTHOR [+2]

Abstract

This circuit generates a train of pulses of repetition rate directly proportional to the amplitude of an input voltage. The train is inversely proportional in frequency.

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Amplitude to Pulse Rate Converter

This circuit generates a train of pulses of repetition rate directly proportional to the amplitude of an input voltage. The train is inversely proportional in frequency.

Binary flip-flop 10 is triggered at time intervals proportional to the amplitude of voltage applied at input terminals 12. The voltage at output terminal 14 is also applied to integrator 20. Integrator 20 has series resistor 22 and shunt capacitor 24 across which a ramp voltage is developed. The amplitude of the ramp voltage is directly proportional to the time period since flip-flop 10 was last triggered. The ramp voltage is applied by Or 30, comprising diode 32, to differential amplifier 40. The amplitudes of the input and ramp voltages are compared in amplifier 40. Circuit 50 is arranged to provide a sharp pulse as the amplitude of the ramp voltage equals that of the analog voltage. The sharp pulse produced by pulser 50 triggers flip-flop 10 to the opposite state of conduction.

The voltage at output terminal 54 of flip-flop 10 is applied to another integrator 60. Another ramp voltage generated across capacitor 64 is applied through Or 30 to amplifier 40. Again a triggering pulse is generated by pulser generator 50. Such occurs as the ramp voltage equals the analog voltage at input terminal 12. This pulse returns flip-flop 10 to the initial state of conduction completing one cycle of operation.

Capacitor 64 is discharged by diode 66 through conducting transisto...