HIGH VOLTAGE BiCMOS SWITCH AND LEVEL TRANSLATOR
Original Publication Date: 1997-Mar-01
Included in the Prior Art Database: 2002-May-17
The circuit presented is a high speed, level translating switch to be used to operate a charge pump of a synthesizer. The charge pump circuitry, with can operate from a five volt supply, is con- trolled by signals which are produced by CMOS logic operating from a three volt supply. To accom- plish this, a high speed switch was designed. The switch accepts a 3 volt control signals and produces control signals at a higher voltage without damage to the gate oxide. This is necessary since the gate oxide of the 0.5um BiCMOS process can only with- stand 3.6 volts without degradation or failure.