Peak detector with feedback

Details Peak detector with feedback Peak detector with feedback

1989-07-14

1990-06-26

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358169, 307354, H04N 514

Patent

active

049376705

ABSTRACT:
A very fast peak detector having feedback is presented. A first device charges a storage capacitor to a voltage proportional to the peak voltage of an incoming signal. A second device coupled to the first device in a feedback configuration further charges the storage capacitor with a charging current in addition to the charging current provided by the first device for more rapidly charging the storage capacitor to said voltage proportional to the peak voltage of a low duty cycle short duration incoming pulse. This detector is particularly applicable to a video system having peak luminance detection requirements.

REFERENCES:
patent: 3914545 (1975-10-01), Engel
patent: 4212032 (1980-07-01), Harford
patent: 4216502 (1980-08-01), Fox
patent: 4599643 (1986-07-01), Harlan
patent: 4751577 (1988-06-01), Kawai
J. C. Maillet, "Peak Detector", IBM.TM. Technical Disclosure Bulletin, vol. 19, No. 14, 1286, 9/76.

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