Power circuit for loudspeaker telephone
AssigneeSiemens Aktiengesellschaft
InventorKlaus Walla
Life of this patent
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Abstract
A power circuit for a loudspeaker telephone station incorporates separate capacitors across the power terminals of the transmitting and receiving amplifiers, with a regulating circuit for charging the capacitor connected across the receiving amplifier only after the other capacitor has been fully charged. A control circuit for the telephone station is connected in parallel with the transmitting amplifier.
Claims6
A power circuit for a loudspeaker telephone having transmitting and receiving amplifiers, each of said amplifiers having a pair of terminals adapted to be connected to a source of DC operating voltage, comprising in combination;
- a first capacitor connected across said terminals of said transmitting amplifier, a second capacitor connected across said terminals of said receiving amplifier, said second capacitor being smaller in capacitance than said first capacitor, and a regulating circuit connected with said capacitors for first charging said first capacitor and then said second capacitor.
Dependencies are inferred from the claim text.