H - Electricity – 03 – K
Patent
H - Electricity
03
K
354/102
H03K 9/08 (2006.01)
Patent
CA 1048650
APPLICATION OF FRANK J. PRZYGYLSKI PULSE DURATION TO CURRENT CONVERTER ABSTRACT A pulse duration to current converter wherein the output current is proportional to the duty cycle, or duration, of the input pulse. A first current source is modulated by an input signal while a second current source is held constant by an input reference signal level. The sum of the currents from the first and second current sources are averaged by a filter network to produce an output signal that is subsequently applied to the noninverting input of an amplifier to be amplified thereby. An output signal from the amplifier is converted to a current output by an output circuit driven by the amplifier. The output circuit will operate with maximum load impedances by using a level shifter at the input of the amplifier to shift the level of operation of the inverting input of the amplifier away from a power source level supplied to the amplifier. The level shifter has a third current source wherein the output impedance of the amplifier is unaffected by the ratio of load impedance of the output transistor and the impedance of the third current source.
241233
Honeywell Inc.
Na
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