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Abstract

A buffer circuit buffers incoming signals, from a local oscillator generator to a mixing circuit and has a push-pull circuit having two inputs, a first being coupled to a first incoming signal, and a second of the inputs being coupled to one of the buffered versions of the incoming signals, having a phase related to that of the first incoming signal. By coupling a second input to a buffered version rather than to the incoming signal, the load presented to the preceding circuit can be halved, while maintaining reduced power consumption. By using as a second input, a signal which is phase related to the first incoming signal, the normal operation of the push-pull circuit can be maintained. The incoming signals from the LO generator can be differential IQ signals and the buffered version of the further incoming signal be in phase with the first incoming signal.

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First Claim