EDGE POWER RAMP USING LOGARITHMIC RESISTOR ATTENUATOR
摘要
<p>A power ramping circuit for use in the transmit path of a radio frequency (RF) circuit. The power ramping circuit includes parallel connected transistors used as logarithmic resistor attenuators for adjusting current to a mixer circuit in the transmit path. The parallel connected transistors can be sized differently, and are sequentially turned off to gradually increase the current provided to the mixer circuit. A ramp control circuit controls the parallel connected transistors in response to either an analog signal or a digital signal.</p>
申请公布号
EP2102990(B1)
申请公布日期
2014.05.07
申请号
EP20070855600
申请日期
2007.12.20
申请人
NVIDIA TECHNOLOGY UK LIMITED
发明人
HOLDEN, ALAN R.;SAFIRI, HAMID R.;FRECHETTE, MICHEL J.G.J.P.;EMBABI, SHERIF H.K.;BELLAOUAR, ABDELLATIF;DEVISON, STEPHEN ARNOLD;MANKU, TAJINDER