Semiconductor IC including circuit for preventing erroneous oper

Details Semiconductor IC including circuit for preventing erroneous oper Semiconductor IC including circuit for preventing erroneous oper

1988-10-05

1990-01-23

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307475, 307542, 307572, H03K 1716, H03K 500

Patent

active

048960560

ABSTRACT:
A semiconductor IC includes a first logic circuit, having a first threshold voltage, for outputting a logic signal corresponding to a level of an input signal which is externally supplied thereto, and an internal circuit for receiving a logic signal from the first logic circuit and executing a predetermined operation. The semiconductor IC further includes a second logic circuit, formed between the first logic circuit and the internal circuit, and having a second threshold voltage higher than the first threshold voltage, one input terminal thereof being connected to an output terminal of the first logic circuit, and the other input terminal receiving a control signal. The control signal is generated while power source noise caused by an operation of the internal circuit is being generated. While the control signal is being generated, a signal of a predetermined logic level is supplied from the second logic circuit to the internal circuit, regardless of an output signal level from the first logic circuit.

REFERENCES:
patent: 4337523 (1982-06-01), Hotta et al.
patent: 4584491 (1986-04-01), Ulmer
patent: 4672243 (1987-06-01), Kirsch
patent: 4707623 (1987-11-01), Bismarck
patent: 4727271 (1988-02-01), Favata et al.
patent: 4791323 (1988-12-01), Austin
patent: 4839583 (1989-06-01), Curtis

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