Programmable power supply system
AssigneeGTE Automatic Electric Laboratories Incorporated
InventorLarry M. Tiedt
Life of this patent
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Abstract
A programmable power supply system which supplies all of the power requirements of a telephone subscriber's loop circuit in a digital telephone switching system. An associated processing unit generates digital control signals to select a particular power supply which generates power, of a particular magnitude in response to the control signals and applies same to a telephone subscriber's loop circuit.
Claims10
A programmable power supply system for use in a digital telecommunication switching system, including a processing unit periodically operated to generate at least one loading signal and digital data representative of a selected voltage to be applied to a selected telecommunication loop circuit, said programmable power supply system comprising:
- pulsing means periodically operated to generate a plurality of clock pulses;
- addressing means connected to said pulsing means operated in response to said clock pulses to generate at least one address signal;
- decoding means connected to said addressing means operated in response to said address signal and said loading signal to generate at least one data transfer signal;
- counting means connected to said processing unit, to said pulsing means and to said addressing means operated in response to said data transfer equal to accept said digital data from said processing unit and further operated in response to a predetermined number of said clock pulses to count down from an initial count represented by said digital data to a reset position and generate a reset signal;
- storage means connected to said counting means and to said addressing means operated to initiate generation of a power control signal in response to said address signal and further operated to terminate generation of said power control signal in response to said reset signal;
- and
- power switching means connected between said selected telecommunication loop circuit and said storage means, operated to generate power of a first characteristic in response to said power control signal and to generate power of a second characteristic in response to an absence of said power control signal and further operated to apply power equivalent to an average of said first and second characteristics, to said telecommunication loop circuit.
Dependencies are inferred from the claim text.