Converter for converting a high frequency video signal to a digi

Details Converter for converting a high frequency video signal to a digi Converter for converting a high frequency video signal to a digi

1977-11-23

1980-07-08

Sloyan, Thomas J.

Communications: electrical

Audible indication

Percussion-type sound producer

340347M, H03K 13175

Patent

active

042119995

ABSTRACT:
A converter for converting a high frequency video input signal to a digital signal by detecting the peak voltages of the input signal. A video input signal fans out to a plurality of comparators of which each are connected to a resistive ladder of equal resistors values. One end of the resistive ladder is connected with a positive reference voltage and the other end is connected with a negative reference voltage. Real time is divided into sampling bins determined by the cycle time of a clock and, within each bin, the digital output from a plurality of master-slave flip-flops shows the maximum level reached by the video input signal. The outputs from the flip-flops go to a pair of priority encoders and a multiplexer for indicating in digital form the highest point reached on the resistive ladder.

REFERENCES:
patent: 3582777 (1971-06-01), Wunderman
patent: 3597761 (1971-08-01), Fraschilla et al.
patent: 3611350 (1971-10-01), Liebowitz et al.
patent: 3728560 (1973-04-01), Treadway
patent: 3806915 (1974-04-01), Higgins et al.
patent: 3829853 (1974-08-01), Freedman
patent: 4069479 (1978-01-01), Carpenter
patent: 4143366 (1979-03-01), Lewis
The Engineering Staff of Analog Devices, Inc., Analog-Digital Conversion dbook, 1972, pp. II-10 to 12.
Nordstrom, High-Speed Integrated A/D Converter, 1976 IEEE International Solid-State Circuits Conference, p. 15.

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