Buffer amplifier

Details Buffer amplifier Buffer amplifier

H - Electricity

03

F

330/27

H03F 3/343 (2006.01) H03F 1/30 (2006.01)

Patent

CA 1126353

BUFFER AMPLIFIER ABSTRACT OF THE DISCLOSURE A buffer amplifier is described for use in an integrated circuit in which a signal from a processing circuit is coupled by the buffer amplifier to an output pin on the integrated circuit. The buffer amplifier includes a pair of transistors, the first of which receives the out- put of the processing circuit and is preferably arranged in an emitter-follower configuration. A resistor internal to the integrated circuit is coupled between ground and the emitter of the first transistor. The second transistor, preferably a vertical PNP type transistor, is arranged in a circuit configuration to couple the output of the first transistor to the output pin and to sink any current flow- ing to the output pin from a circuit driven by the buffer amplifier.

329063

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