Gain compensation in an ultra-wideband transceiver
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United States of America Patent
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Nov 20, 2007
Grant Date -
May 17, 2007
app pub date -
Nov 16, 2005
filing date -
Nov 16, 2005
priority date (Note) -
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Abstract
A circuit for providing gain compensation to a swept frequency response in an ultra-wideband system includes using a variable amplitude IF signal into a gigahertz mixer to control the amplitude of a ultra-wideband transmitter. The variable amplitude IF signal is generated by a multiplier receiving a fixed-level intermediate frequency (IF) signal and a gain control input. The gain control input being provided by an digital-to-analog converter controlled by gain control values in a look-up table. The values of the look-up table are generated by inverting, normalizing, and scaling the uncompensated gain response of the ultra-wideband system. The gain compensated system produces a substantially flat amplitude response at the output of a quadrature receiver.
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