Hybrid high speed voltage regulator with reduction of miller effect
First Claim
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1. A voltage regulator for regulating voltage applied to a load from an input voltage source supplying a source voltage, said load being activated during occurrence of a load pulse, comprising:
- a first voltage regulator means supplied with an input voltage at an input and connected to said load for regulating voltage applied to said load, said first voltage regulator means exhibiting a response time which decreases with increase in input voltage to said first voltage regulator means and power consumption which increases with increase in input voltage to said first voltage regulator means; and
a programmed voltage regulator means connected to said input voltage source and to the input of said first voltage regulator means for controlling the input voltage to said first voltage regulator means, said programmed voltage regulator means supplying an increased input voltage to said first voltage regulator means at the beginning of said load pulse to provide faster response and thereafter reduces the input voltage to said first regulator means to reduce power consumption.
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Abstract
A linear regulator employing a field effect transistor (FET) pass element to supply a pulsed load is programmed by a cooperating switching regulator such that an increased voltage differential is maintained across the FET to reduce response time during the leading edge of the load pulse and to thereafter reduce the voltage differential to achieve reduced power consumption and increased efficiency during the remainder of the load pulse.
72 Citations
19 Claims
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1. A voltage regulator for regulating voltage applied to a load from an input voltage source supplying a source voltage, said load being activated during occurrence of a load pulse, comprising:
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a first voltage regulator means supplied with an input voltage at an input and connected to said load for regulating voltage applied to said load, said first voltage regulator means exhibiting a response time which decreases with increase in input voltage to said first voltage regulator means and power consumption which increases with increase in input voltage to said first voltage regulator means; and a programmed voltage regulator means connected to said input voltage source and to the input of said first voltage regulator means for controlling the input voltage to said first voltage regulator means, said programmed voltage regulator means supplying an increased input voltage to said first voltage regulator means at the beginning of said load pulse to provide faster response and thereafter reduces the input voltage to said first regulator means to reduce power consumption. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. In a voltage regulator for regulating voltage supplied to a load which is activated during a load pulse and wherein said voltage regulator exhibits a response time which decreases with increase in input voltage to said regulator and power consumption which increases with increase in input voltage, the improvement comprising:
means for supplying an increased input voltage to said voltage regulator at the beginning of said load pulse to provide faster response and thereafter reducing said input voltage to reduce power consumption.
Specification