Telephone ringing signal generator

Details Telephone ringing signal generator Telephone ringing signal generator

1981-08-26

1983-11-15

Goldberg, Elliot A.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

307108, H03K 351

Patent

active

044159617

ABSTRACT:
A waveform generator (FIG. 1) contains a static energy storage device circuit in which storage devices (C1 through C6) are interconnected in a fixed topological configuration. The storage device circuit has a plurality of input and output terminals (12 through 18). Charge storage is accomplished by controllably steering (20, 40) a supplied DC signal (10a,b) to a selected one, or selected ones, of the storage devices via the appropriate input terminals. AC waveforms are generated (11a,b) by controllably selecting (30, 40), in predetermined sequence, each output terminal of the storage device circuit.

REFERENCES:
patent: 3553479 (1971-01-01), Nelson
patent: 4015091 (1977-03-01), Rao et al.
patent: 4135235 (1979-01-01), Baker
patent: 4203151 (1980-05-01), Baker

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