Double-source frequency-mixing phase-shifting sine wave modulation system

• Main Authors: CHEN CHUNYAN, WEN TAO, LI CIHANG
• Format: Patent
• Language: Chinese; English
• Published: 01.03.2024
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; GENERATION OF NOISE BY SUCH CIRCUITS; GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER

According to the double-source frequency-mixing phase-shifting sine wave modulation system, frequency-mixing phase-shifting amplitude modulation is carried out through low-order-number and low-cost components, single-tone sine wave excitation source simulation is achieved, and a single-tone sine wave excitation source with high-precision modulation amplitude is provided. The circuit comprises a clock signal, at least two groups of sine wave output units, an operational amplifier and a low-pass filtering unit, the clock signal provides a sampling clock for the operational amplifier and all the sine wave output units, and the sine wave output units are correspondingly connected to the input end of the operational amplifier. A phase shifter is arranged between each sine wave output unit and the operational amplifier, each phase shifter carries out phase shifting processing with the same phase difference theta on output signals of the corresponding sine wave output unit, and the operational amplifier carries out