Power Supply Circuits Incorporating Transformers For Combining Of Power Amplifier Outputs And Isolation Of Load Voltage Clamping Circuits

摘要

A power supply circuit includes a power amplifier that receives a direct current (DC) voltage from a first power source. A control signal applied to the power amplifier causes the power amplifier to convert the DC voltage to an alternating current (AC) output signal. The AC output signal is applied to a transformer that includes a first winding, a second winding, and a third winding. The first winding receives the AC output signal and the second winding receives an output current that varies in accordance with the AC output signal to apply current to a load. A rectifier includes a plurality of diodes configured to rectify a voltage across the third winding and clamp the voltage at the load. Return power from the third winding may be returned to the first power source.

主权项

1. A power supply circuit comprising:
a power amplifier configured to receive (i) a direct current (DC) voltage from a first power source, and (ii) a control signal, and based on the control signal, convert the DC voltage to an alternating current (AC) output signal; a transformer comprising a first winding, a second winding, and a third winding, wherein the first winding is configured to receive the AC output signal, wherein the second winding is configured to receive an output current based on the AC output signal, and wherein the second winding supplies current to a load via an output terminal; and a rectifier and clamping circuit comprising a plurality of diodes, wherein the diodes are configured to (i) rectify a voltage across the third winding, (ii) clamp a voltage at the output terminal, and (iii) return power from the third winding to the first power source or a second power source.