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Multi-channel-video-switch-using-dual-gate-MOS-FETS

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Multi-channel video switch using dual-gate MOS-FETS

Details

Inventors: Hand, Wilfred L.; Brun, Craig W.;
Assignee: GTE Sylvania Incorporated (Stamford, CT)
Primary Examiner: Griffin; Robert L.
Assistant Examiner: Psitos; Aristotelis M.
Attorney, Agent or Firm: Lindgren; Theodore D.

A high-speed, solid-state, electronic circuit for alternately coupling two separate video signal paths to a third video signal path in response to high frequency square wave excitation, the circuit utilizing two dual-gate metal oxide semiconductor field effect transistors having oppositely phased signals applied to respective switching gates for cancellation of switching transient signals.

DETAILED DESCRIPTION In accordance with the present invention a video switch circuit provides alternate connection of two separate video signal paths to a third video signal path using a pair of dual-gate metal oxide semiconductor field effect transistors, (MOS-FETs).
Oppositely phased switching signals are transmitted to the two MOS-FET devices, each of the devices is coupled to a separate video signal path and each of the devices is connected to a common third video signal path.
As a result, the switching signal energy injected into the video signal output through one of the MOS-FET devices is substantially canceled by switching signal energy removed from the video signal output through the other MOS-FET device.

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