One shot pulse width modulating converter

Details One shot pulse width modulating converter One shot pulse width modulating converter

1984-08-22

1986-06-10

Shoop, Jr., William M.

Communications: electrical

Audible indication

Percussion-type sound producer

340347M, 307353, 307265, H03M 112

Patent

active

045945780

ABSTRACT:
A one shot voltage to pulse width converter is provided for producing a digital representation of an analog input signal voltage. The circuit includes an integrating amplifier circuit whose output is kept at a reference potential except when it is being ramped up in response to connection of an input signal to the integrating amplifier during a fixed input sample period or down after the fixed input sample period expires. The circuit also includes a comparator connected to compare the output of the integrating amplifier to the reference potential with the output of the comparator switching an output circuit between two different levels so that the pulse width of the output is related to the magnitude of the input signal. When the input signal is not connected to the integrating amplifier its output is held at reference potential by a negative feedback from the comparator output to the integrating circuit input.

REFERENCES:
patent: 3599203 (1971-08-01), Conley
"Bipolar and MOS Analog Integrated Circuit Design", Alan B. Grebene, Wiley & Sons, 1984.

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