Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1995-03-29
1996-07-16
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327328, 327332, 327170, H03K 301
Patent
active
055370730
ABSTRACT:
A clamping circuit clamping a boost signal supplied on a boost line includes a p-channel, MOS transistor and an n-channel MOS transistor. These MOS transistors are serially connected between an internal power supply line and the boost line. p-channel MOS transistor receives a clamping level control signal from a clamp control circuit at its gate. In accordance with the clamping level control signal a clamping level given by clamping circuit is varied. Therefore, by decreasing the clamping level of the boost line during an overvoltage-applied mode such as burn-in test, deterioration of components due to an overvoltage can be prevented.
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Callahan Timothy P.
Mitsubishi Denki & Kabushiki Kaisha
Nu Ton My-Trang
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