exp
Full Member level 1
A switched capacitor behaves like a resistor with resistance Req=1/(C*f) (f being the switching frequency).
Based on this many papers describe the input resistance of the mixer by this which is clearly frequency dependent:
However, another paper derives the resistance as being independent of the LO frequency:
This is totally confusing. How does it fit together?
Based on this many papers describe the input resistance of the mixer by this which is clearly frequency dependent:
- A Resistively Degenerated Wideband Passive Mixer With Low Noise Figure and High IIP2 (Kim, Larson et.al.)
- 1/f Noise in Passive CMOS Mixers for Low and Zero IF Integrated Receivers (Redman-White et Leenaerts)
- A wideband current-commutating passive mixer for multi-standard receivers in a 0.18um CMOS (Kuan et.al.)
However, another paper derives the resistance as being independent of the LO frequency:
- Implications of Passive Mixer Transparency for Impedance Matching and Noise Figure in Passive Mixer-First Receivers (Andrews and Molnar)
This is totally confusing. How does it fit together?