Electronic digital logic circuitry – Interface – Logic level shifting
Patent
1993-09-22
1995-06-06
Bowler, Alyssa H.
Electronic digital logic circuitry
Interface
Logic level shifting
395500, H03K 5003
Patent
active
054225230
ABSTRACT:
An apparatus having a 3.3 volt power supply and a 5 volt power supply, wherein digital signals are processed on a 3.3 volt basis which are translated to a 5 volt basis by a voltage translation circuit before being output. The voltage translator is comprised of an inverter for inverting an input signal. The inverter is powered by the 3.3 volt power supply. A p-channel transistor having its source coupled to the 5 volt power supply and its gate driven by the output of the inverter is implemented. When the inverter generates a low logic, the p-channel transistor is turned on and outputs 5 volts. An n-channel transistor having its source coupled to ground and its gate driven by the output of the inverter is also implemented. When the output of the inverter is 3.3 volts, the n-channel transistor is turned on, which pulls the output to ground. Therefore, when the input signal is at 3.3 volts, a 5 volt signal is output from the voltage translation circuit. When the input signal is at 0 volts, the output signal is, likewise, at 0 volts.
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Almulla Waleed S.
Heaney Bradley G.
Leong Gloria
Mayer Ronald J.
Roberts Meeling
Bowler Alyssa H.
Fiul Dan
Intel Corporation
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