GS4982 Gennum Corporation, GS4982 Datasheet
GS4982
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GS4982 Summary of contents
Page 1
... No and comparing it against the expected input signal scan rate. Yes The GS4882 and GS4982 are available in standard 8 pin PDIP and SOIC packages, operate with a + 4.5 to +13.2 volt supply Yes voltage range and typically consume less than current with supply voltage ...
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... Delay from Video OUTPUT (GS4882) Temperature Stability Delay BACK PORCH Pulse Width OUTPUT Pulse Width VERTICAL SYNC OUTPUT Delay from Video HORIZONTAL OUTPUT Pulse Width (GS4982) Probation Period OUTPUT MUTE Lock Time R R Ref. Voltage SET SET REFERENCE V OH LOGIC OUTPUTS V OL ...
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... CIRCUIT DESCRIPTION The Block Diagrams for the GS4882 and GS4982 are shown in Figure 6 and Figure 7, with timing diagrams for the devices shown in Figure 8. When presented with a composite video input signal, the GS4882 outputs composite sync, vertical sync, back porch and odd/even field information. The GS4982 substitutes the composite sync output with a horizontal sync output, for those applications requiring horizontal sync extraction ...
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... This horizontal sync signal is a true horizontal signal (i.e. maintained during the vertical interval) and is output on pin 1 of the GS4982. A delay of 420 ns and a width of 8.0 µs are typical for this signal. The internal Windowing Circuit which generates horizontal sync provides excellent impulse noise immunity as shown in Figure 5 ...
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... SIGNAL DETECT AND OUTPUT MUTE Internal to the GS4882 and GS4982 is a robust video signal detection circuit. This circuit provides a reliable control signal that will enable the sync separator outputs only when a valid video signal is present. When the input signal is not valid, the outputs are muted and stay in a logic high state ...
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... GS4882, GS4982 Fig. 8 VIDEO 75 All resistors in ohms, all capacitors in microfarads unless otherwise stated 521 - HSYNC INTERNAL COMPOSITE VIDEO INPUT BACK PORCH OUTPUT 525ns GS4882, GS4982 Video Sync Separator Timing Diagram V CC 0.1 8 GB4571 STROBED 2 DC RESTORE CLAMP 0.1 C HOLD 1 ...
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... Gennum Corporation assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement. DOCUMENT IDENTIFICATION PRODUCT PROPOSAL This data has been compiled for market investigation purposes only, and does not constitute an offer for sale. ...