| 摘要 |
<p>A signal input has two signal terminals (RF 302,RFN 303) and receives an input signal (VRF). A first input signal transistor (308) has its control input connected to the first signal terminal. A second input signal transistor (309) has its control input connected to the second signal terminal. A local oscillator input to the mixer circuit (301) receives the local oscillator signal (VLO). An intermediate frequency output is provided for outputting the IF signal (VZF). A capacitance is provided between a first controlled terminal of the first input signal transistor and a first controlled terminal of the second input signal transistor. The mixer circuit may be arranged in the form of a Gilbert cell. The transistors may be bipolar transistors or MOSFETs, formed using BiCMOS, CMOS or SiGe technology.</p> |
