Integrated circuit for image pickup device

Details Integrated circuit for image pickup device Integrated circuit for image pickup device

2005-06-14

2005-06-14

Browne, Lynne H. (Department: 2116)

Electrical computers and digital processing systems: support

Computer power control

Power conservation

C713S300000, C713S323000, C348S476000, C348S477000

Reexamination Certificate

active

06907536

ABSTRACT:
A design for reducing the power dissipation in an integrated circuit for an image pickup device. Placing a circuit block (2), such as for generating a driving signal to an image pickup apparatus, in a standby state within a vertical blanking period or horizontal blanking period reduces the power dissipation at the circuit block (2). Since the blanking period is short, it is necessary to rapidly restore normal operation from standby so as to ensure the standby time. A switch (6) is provided between a terminal of the circuit block (2) and a capacitor (4) that is provided for voltage regulation at the terminal. A controller (8) turns off the switch (6) and disconnects the capacitor (4) from the circuit block (2) in a period where the circuit block (2) is placed in a standby state. As a result, variations in the amount of stored charge in the capacitor (4) during standby are suppressed, and while resetting to normal operation the time for returning the capacitor (4) to the amount of stored charge for normal operation is shortened so that the reset operation is performed rapidly.

REFERENCES:
patent: 4910413 (1990-03-01), Tamune
patent: 4945424 (1990-07-01), Hiroki et al.
patent: 4953028 (1990-08-01), Murayama et al.
patent: 5371540 (1994-12-01), Tamura et al.
patent: 6272030 (2001-08-01), Oomura
patent: 4035574 (1991-05-01), None
patent: 63-126371 (1988-05-01), None

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