Self regulating telephone sets

Details Self regulating telephone sets Self regulating telephone sets

1973-11-29

1976-03-23

Olms, Douglas W.

1791702, 179 1VL, H04M 908

Patent

active

039461700

ABSTRACT:
A self regulating telephone apparatus wherein an individual's speech is converted to a representative electrical signal. This signal is represented by a product wave or waves of the form f(A)t x f(B)t where f(A)t represents the amplitude of the informational signal f(B)t. The signal is separated by demodulation of the cross product into its components. The relative amplitudes of the terms are changed as desired and the cross product re-established by remodulation. Since the term f(A)t represents the amplitude and its frequency range is removed from f(B)t, amplification can be provided at frequencies exhibiting low coupling between the receiver and transmitter transducer in a hand telephone set to permit increasing the signal volume output as required.

REFERENCES:
patent: 3483335 (1969-12-01), Piotrowski
patent: 3567873 (1971-03-01), Peroni
patent: 3585311 (1971-06-01), Berkley et al.
patent: 3699271 (1972-10-01), Berkley et al.

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