Excavating
Patent
1992-03-19
1994-02-08
Canney, Vincent P.
Excavating
371 66, 371 14, G06F 1100
Patent
active
052854523
ABSTRACT:
A VCR or other microcomputer controlled equipment may be subjected to AC supply interruption resulting from many causes, such as, plugging or unplugging the AC supply with the unit switched on, contact bounce on the AC power switch, AC supply drop outs caused by heavy load switching, lightning etc. Short term AC disconnects should not result in the VCR user settings being lost or the user having to manually reset the control system to restore operability. To gain the earliest indication of imminent supply interruption, the AC supply is monitored and a control signal (STOP) is produced that instructs the microcomputer system to save current parameters and assume a low power dissipation mode. With the reappearance of the supply, a RESET signal is generated which enables commencement of the microcomputer system. AC interruptions as short as two cycles are detected and STOP and RESET signals are produced.
REFERENCES:
patent: 4234920 (1980-11-01), Van Ness et al.
patent: 4523295 (1985-06-01), Zato
patent: 4531214 (1985-07-01), Torres et al.
patent: 4943762 (1990-07-01), Campbell et al.
Technical Training Manual RCA/GE Color TV TX81 Publication No. FL51513KK Dated 1990, pp. 12/13.
Partial Schematic Drawings for RCA/GE Color TV TX81 Publication No. FL51231TH Dated 1990.
Partial Schematic Drawings of Timer and Power Supply Modules for JVC VCR HRD960U Publication No. 82191 dated Jul. 1990.
Technical Data for Hitachi Microcomputer HD404729 Published Jun. 1991.
Von Thomas Schaerer, Einschaltautomatik fur Atari-ST, Funkschau Jun. #12, pp. 106/7/8 Germany.
Chang Chiew Mun
Wee Chow Sung
Canney Vincent P.
Davenport Francis A.
Laks Joseph J.
Thomson Consumer Electronics S.A.
Tripoli Joseph S.
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