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US 4,286,120 AGranted
Current regulated pulse dialer circuit
AssigneeGTE Automatic Electric Labs Inc.
InventorJohn D. Sublette
Life of this patent
Estimating the term…
Abstract
A current regulated pulse dialer circuit for use in a loop powered pulse dialing telephone. A current source is connected to an electronic pulse dialer to provide high impedance across a telephone line during transmission and interpulse pause conditions.
Claims5
A current regulated pulse dialer circuit for use in a pulse dialing telephone, including digit signaling means and a line connection, said pulse dialer circuit comprising:
- pulse dialing means connected to said digit signaling means and to said line connection, operated in response to a digit signal to decode said digit signal and generate pulses, representative of said digit on said line connection;
- and
- a current regulator connected to said pulse dialing means and to said line connection operated to increase the impedance across said line connection through said pulse dialing means.
Dependencies are inferred from the claim text.