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Power supply to RF signal Chain

Question asked by veera on Nov 17, 2012
Latest reply on Nov 20, 2012 by jdobler

For our application, we cannot provide LDO supply to our RF signal chain. We have to depend upon Switch-mode power supply because of higher current requirement. Hence I am worried about performance issues in our chain due to noise contend in power lines. In our signal chain we have Mixers, Amplifiers, Gain blocks and AGC modules. Are there any design suggestions to keep the Performance degradation ot the minimum with Switch mode supplies. I understand the degradation amount and amount of tolerance depends on the project specs, but are there any general suggestions to improve the system?

 

Is there any critical component which definitely needs LDO? For PLL+VCO module, we are powering through LDO, but does Mixer or Gain block modules require the same? We do not have Data converters onour chain.

 

Is there any Technical note available covering upon this subject?

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