Regulated bifurcated power supply
First Claim
1. A regulated power supply comprising:
- a first input terminal, a second input terminal, a third input terminal and a fourth input terminal, said first and said second input terminals constituting a first input terminal pair for receiving a first input voltage, said third and said fourth input terminals constituting a second input terminal pair for receiving a second input voltage;
a variable impedance means connected between said second input terminal and said third input terminal, said variable impedance means providing a path of current flow between said second input terminal and said third input terminal and introducing a voltage drop along the path in a direction of the current flow, the power supply providing an output voltage comprising the sum of said first and said second input voltages minus said voltage drop of said impedance means;
means for sensing said output voltage;
driver means coupled between said sensing means and said impedance means for operating said impedance means to increase the voltage drop in response to a sensed increase of said output voltage by said sensing means, thereby to regulate the output voltage of the power supply.
4 Assignments
0 Petitions
Accused Products
Abstract
A regulated power supply employs two separate sources of power which are serially connected by a variable impedance element, such as a transistor, connected between the two power sources. Output voltage of the power supply is equal to the sum of the individual power supply voltages minus a voltage drop across the variable impedance element. A sensor circuit employing standby and active mode branches is coupled between output terminals of the power supply for control of the variable impedance element. The active branch of the sensor is switchably connected to an output power terminal of the supply so as to be operative only during the active mode. The standby branch comprises a resistive network coupled to a reference diode while the active branch comprises a feedback amplifier coupled to the reference diode.
-
Citations
11 Claims
-
1. A regulated power supply comprising:
-
a first input terminal, a second input terminal, a third input terminal and a fourth input terminal, said first and said second input terminals constituting a first input terminal pair for receiving a first input voltage, said third and said fourth input terminals constituting a second input terminal pair for receiving a second input voltage; a variable impedance means connected between said second input terminal and said third input terminal, said variable impedance means providing a path of current flow between said second input terminal and said third input terminal and introducing a voltage drop along the path in a direction of the current flow, the power supply providing an output voltage comprising the sum of said first and said second input voltages minus said voltage drop of said impedance means; means for sensing said output voltage; driver means coupled between said sensing means and said impedance means for operating said impedance means to increase the voltage drop in response to a sensed increase of said output voltage by said sensing means, thereby to regulate the output voltage of the power supply. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification