Mixer. Performance Parameters Gain (convolution analysis) Port-to-Port Feedthrough (Noise)...
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Transcript of Mixer. Performance Parameters Gain (convolution analysis) Port-to-Port Feedthrough (Noise)...
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