Voltage translator with gate oxide breakdown protection

Details Voltage translator with gate oxide breakdown protection Voltage translator with gate oxide breakdown protection

1998-07-20

2000-10-03

Tokar, Michael

Electronic digital logic circuitry

Interface

Supply voltage level shifting

326 83, H03K 190175

Patent

active

061278483

ABSTRACT:
A circuit for voltage translation includes protection against gate oxide breakdown when translating a lower voltage signal into a higher voltage signal. An input signal inverter circuit inverts the lower voltage signal into an intermediate signal having an increased minimum value. By raising the maximum value of the intermediate signal to the voltage level of the higher voltage signal, an output signal inverter circuit produces a driving signal to drive an output stage. However, because the increased minimum value of the signal is maintained, the gate oxide breakdown voltage is not exceeded in the circuit. The circuit also includes a blocking transistor between the input signal inverter and the output signal inverter to prevent the larger driving signal from overloading the input inverter circuit.

REFERENCES:
patent: 5406140 (1995-04-01), Wert et al.
patent: 5534795 (1996-07-01), Wert et al.
patent: 5559464 (1996-09-01), Orii et al.
patent: 5568065 (1996-10-01), Wert et al.

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