Power supply switch for wafer scale applications
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United States of America Patent
Stats
-
Jul 18, 1989
Issued Date -
N/A
app pub date -
Dec 21, 1987
filing date -
Dec 2, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An adjunct switch circuit is provided for detecting power to ground leaks in a portion of a chip circuit and for disabling such circuit portion in the event of a leak. The switch circuit of the invention is particularly useful for Wafer Scale Integration, and is conveniently employed in the testing of chip circuits following manufacturing. In a preferred embodiment, the switch circuit includes a power supply, including a voltage source and a ground, a reset line for receiving a reset pulse, a first switch, connected in series with one of the power supply lines to the circuit portion ground and inversely responsive to both the reset pulse and the state of the circuit portion ground following termination of the reset pulse, and a second switch, connected between ground and the circuit portion ground and directly responsive to the reset pulse to leak current from the circuit portion ground to ground when turned on by the reset pulse.
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