초록 ▼

A switching power amplifier circuit has the functions of a power inverter and a switching amplifier embodied into one integral circuit. Two high frequency switching inverter circuits are connected back to back sharing the same inverter power transformer. One switching inverter circuit processes powe

A switching power amplifier circuit has the functions of a power inverter and a switching amplifier embodied into one integral circuit. Two high frequency switching inverter circuits are connected back to back sharing the same inverter power transformer. One switching inverter circuit processes power from an input rail to an output capacitor while the other switching inverter circuit processes power from the output capacitor to the input rail. The output capacitor voltage is regulated with respect to a signal input in order to obtain the desired output signal waveform. A blocking capacitor in the output absorbs the DC component of the output capacitor voltage and allows a pure AC ringing signal to be applied to the load. In an application as a ringing generator circuit the signal input is supplied by a ringing signal oscillator circuit.

대표청구항 ▼

An electronic ringing signal generator comprising: an input for accepting a DC voltage source; an output for coupling to a ringing signal load; a first switching circuit concerned to the input; a second switching circuit connected to the output; the first and second switching circuits coupled to a b

An electronic ringing signal generator comprising: an input for accepting a DC voltage source; an output for coupling to a ringing signal load; a first switching circuit concerned to the input; a second switching circuit connected to the output; the first and second switching circuits coupled to a bidirectional power coupling circuit; a reference signal input for accepting an AC reference signal; a first control circuit for regulating power flow from the input to the output by controlling the first switching circuit to connect the input to the bidirectional power coupling circuit when an AC voltage at the output is less than the AC reference signal; and a second control circuit for regulating power flow from the output to the input by controlling the second switching circuit to connect the output to the bidirectional power coupling circuit when an AC voltage at the output is greater than the AC reference signal.