Patent ID: 9037100
Filing Date: 2015-05-19
Classification: H04B

Abstract:
1. A wireless transmitter for resolving gain mismatch of TV band, comprising: a two-stage 14-path harmonic-rejection mixer configured to manage harmonic rejection ratio in lower sub-bands, a first stage of the 14-path harmonic-rejection mixer including lowpass filters and a mixer bank, and a second stage of the 14-path harmonic-rejection mixer including driver amplifiers; and a two-stage 6-path harmonic-rejection mixer configured to manage harmonic rejection ratio in upper sub-bands, a first stage of the 6-path harmonic-rejection mixer including lowpass filters and a mixer bank, and a second stage of the 6-path harmonic-rejection mixer including driver amplifiers; wherein outputs of the two-stage 14-path harmonic-rejection mixer and the two-stage 6-path harmonic-rejection mixer are combined at the driver amplifiers, and wherein the gain mismatch is resolved by selecting gain ratios of the first and the second stage of the two-stage 14-path harmonic-rejection mixer and the two-stage 6-path harmonic-rejection mixer.