Variable waveform synthesizer using digital circuitry

Details Variable waveform synthesizer using digital circuitry Variable waveform synthesizer using digital circuitry

1975-07-23

1977-12-06

Sloyan, Thomas J.

Boots, shoes, and leggings

328 14, 340347DA, H03K 1300

Patent

active

040619095

ABSTRACT:
A variable waveform synthesizer capable of converting a digital pulse train to a variety of analog waveforms. A binary counter responsive to the digital pulse train supplies sequential binary counting outputs to a decoding network. The decoding network decodes the counter states and provides a plurality of individual pulse outputs, each output active in response to only one state of the binary counter. A gate pulse generator is also provided to vary the width of the digital pulse train. Each decoder output, after combination with the gate pulse, is applied to a synthesizing network that varies the amplitude of the pulses received and constructs from these varied amplitude pulses an approximate analog waveform. Current sources are used to construct from the sequential pulses received, pulses of varying amplitude. An output circuit accepts and combines these pulses to synthesize an approximate symmetrical analog waveform.

REFERENCES:
patent: 2977518 (1961-03-01), Kafka et al.
patent: 3215860 (1965-11-01), Neumann
patent: 3334292 (1967-08-01), King et al.
patent: 3586985 (1971-06-01), Schoendorff
patent: 3605002 (1971-09-01), Smyth
patent: 3656151 (1972-04-01), Richeson
patent: 3657657 (1972-04-01), Jefferson
patent: 3752973 (1973-08-01), Thorn et al.
patent: 3778814 (1973-12-01), Dildy
patent: 3838414 (1974-09-01), Wiles
Landee et al., Electronic Designers' Handbook, 1957, McGraw-Hill Book Co., pp. 22-4, 22-14 to 22-17.

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