Self-frequency-selection frequency mixing circuit based on characteristics of junction capacitor

• Main Authors: ZHAO LI, LIU YUE, LIAO YONG, LI LICHUN, GONG CHENGFENG, YU CHEN, LI AOWEN, LIN JUNRAN, LIAO HANXIAO
• Format: Patent
• Language: Chinese; English
• Published: 14.06.2024
• Subjects: BASIC ELECTRONIC CIRCUITRY; DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TOANOTHER; ELECTRICITY; IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS

The invention discloses a self-frequency-selection frequency mixing circuit based on the characteristics of a junction capacitor, which comprises an input matching module, a choke filter circuit, a frequency selection network, a field effect transistor, a high-pass filter circuit and an output matching module, and is characterized in that an input signal enters the choke filter circuit for filtering after being subjected to impedance matching and phase modulation through the input matching module; then the input signals enter the grid electrode of the field effect transistor, resonance signals with different frequencies can be generated due to the action of the grid electrode and the varactors of the source electrode, then the resonance signals with the needed frequency enter the frequency selection network to be selected, the resonance signals and new input signals are subjected to frequency mixing processing through the varactors of the grid electrode and the drain electrode, and signals with the higher fre