Patent ID: 9071317
Filing Date: 2015-06-30
Classification: H04B

Abstract:
1. A transceiver for nullification of a noise component in a transmitter, said transceiver comprising: circuitry configured to vary output impedance at a node of said transmitter so as to nullify said noise component at said node, said node receiving a transmit signal prior to said transmit signal being amplified for transmission; and a pre-power amplifier and a transformer configured to form a feedback loop with said circuitry, wherein said circuitry includes mixers configured to receive inputs from said node and a receiver local oscillator and to generate differential signals based on the received inputs from said node and said receiver local oscillator, and the transformer is configured to receive the differential signals, to generate a signal based on the received differential signals, and to output said signal to said pre-power amplifier to vary said output impedance at said node.