mixer. performance parameters gain (convolution analysis) port-to-port feedthrough (noise)...
Post on 24-Dec-2015
230 Views
Preview:
TRANSCRIPT
Mixer
Performance Parameters
• Gain (convolution analysis)• Port-to-Port Feedthrough• (Noise)• (Linearity)
Feedthrough Mechanism in a Mixer
(LO re-radiation)
Single Ended Pasive RF Mixer
Frequency Spectrum
LO
RF
LO-RF Feedthrough
Differential Mixer
Waveform
Voutp-Voutn
Frequency Spectrum
ComparisonReduced RF FeedthroughReduced DC Offset
Double Balanced Passive Mixer
Waveforms
Frequency Spectrum
No DC, RF, and LO Feedthrough
Output Waveform
Sampling Mixer
Sampling Mixer
Rf: 100 Hz, LO: 400 Hz
Waveform of Sampling Mixer
DFT of the Output Spectrum
Use PMOS to Improve Sampling
Improved Sampling Due to PMOS
Output Spectrum of CMOS Switch
top related