Integrated circuit chip of dual frequency band reconfigurable frequency mixer
An integrated circuit and mixer technology, applied in the field of dual-band reconfigurable mixer integrated circuit chips, can solve the problems of increased circuit complexity, reduced frequency conversion gain, larger chip area, etc., and achieves the goal of optimizing gain flatness Effect
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[0082] figure 1 It is a complete topological diagram of the circuit. The whole circuit can be divided into four parts: NM 1 and NM 2 Form Part A, NM 3 and NM 4 Form Part B, PM 3 , PM 4 , PM 5 and PM 6 Make up part C and the rest make up part D.
[0083] Part A is the current source; Part B is the transconductance stage, and the RF signal is input through source-gate cross-coupling; C is the switch stage; D is the load stage, which can switch the working frequency band by adjusting the load resistance and frequency resonance point by controlling the voltage.
[0084] current source circuit. MOS tube NM 1 and NM 2 Working in the saturation region, according to the square ratio relationship between the leakage current of the MOS tube and the gate-source voltage, it provides a stable DC working current for the circuit.
[0085] Transconductance stage circuits. MOS tube NM 3 and NM 4 Working in the saturation region, the RF input voltage signal is converted into a hi...
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