Electronic ringing signal generator

Details Electronic ringing signal generator Electronic ringing signal generator

1988-12-22

1989-09-12

Wong, Peter S.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 21, 363 80, 363 97, 323271, 379418, H02M 3335

Patent

active

048665878

ABSTRACT:
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.

REFERENCES:
patent: 3986097 (1976-10-01), Woods
patent: 4015091 (1977-03-01), Rao et al.
patent: 4056693 (1977-11-01), Bosik et al.
patent: 4189764 (1980-02-01), Snyder
patent: 4257087 (1981-03-01), uk
patent: 4395675 (1983-07-01), Toumani

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