Patent ID: 9559792
Date: 2017-01-31
CPC Classifications: H04B,H04L

Claim:
1. An apparatus for in-phase and quadrature phase (“IQ”) generation, comprising: a linear amplifier configured for amplifying an oscillator output to provide an amplified oscillator output; a polyphase filter circuit configured for receiving the amplified oscillator output and performing polyphase filtering of the amplified oscillator output into a first quadrature output; the polyphase filter circuit comprising a plurality of filter circuit stages configured for filtering the amplified oscillator output into the first quadrature output; a divider circuit configured for receiving the amplified oscillator output from a common input coupling with the polyphase filter circuit and dividing the amplified oscillator output into a second quadrature output; and a multiplexer circuit coupled to the divider circuit and the polyphase filter circuit and configured for selecting either the first quadrature output or the second quadrature output as an IQ output based on a bandwidth of the oscillator output.