Patent US 4135201A: Difference between revisions

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''A switching element is placed across a filter and controllably activated to dynamically change the response of the filter. Specifically, additional damping is switched into the "Bell" characteristic, interjected during blanking and removed after the beginning of white lead-in, to dynamically change the response of the band-pass "Bell" filter in a Sequential Color and Memory Television System.''

Latest revision as of 03:34, 15 July 2024

Patent number US 4135201A (click link for details and documents via Google Patents)
Title Dynamic damping for SECAM high-frequency de-emphasis
Inventors Doug Dickie, Larry Nelson
Company Tektronix Inc
Filing date 1977-03-09
Grant date 1979-01-16


Documents referencing Patent US 4135201A:

Document Title Authors Year Links
Technology Report October 1979.pdf Patent Received: 4,135,201 Dynamic Damping for SECAM High-Frequency De-Emphasis Doug Dickie 1979

A switching element is placed across a filter and controllably activated to dynamically change the response of the filter. Specifically, additional damping is switched into the "Bell" characteristic, interjected during blanking and removed after the beginning of white lead-in, to dynamically change the response of the band-pass "Bell" filter in a Sequential Color and Memory Television System.