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

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Presentation 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

Comparison Reduced RF Feedthrough Reduced DC Offset

Double Balanced Passive Mixer

Waveforms

Frequency Spectrum No DC, RF, and LO Feedthrough

Output Waveform

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

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