Voltage regulator with shunt feedback
First Claim
1. A voltage regulator configured to receive a supply voltage from a voltage supply and provide a regulated voltage to digital circuitry, the voltage regulator comprising:
- first circuitry configured to inhibit high frequency energy generated by the digital circuitry from transmitting into the voltage supply;
second circuitry configured to inhibit low frequency energy generated by the digital circuitry from transmitting into the voltage supply; and
third circuitry, having two current sources and two transistors respectively connected to the two current sources, configured to maintain the regulated voltage at a substantially constant value in response to a first current drawn by the digital circuitry.
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Accused Products
Abstract
A voltage regulator configured to receive a supply voltage from a voltage supply and provide a regulated voltage to digital circuitry is provided. The voltage regulator comprises first circuitry configured to inhibit high frequency energy generated by the digital circuitry from transmitting into the voltage supply, second circuitry configured to inhibit low frequency energy generated by the digital circuitry from transmitting into the voltage supply, and third circuitry configured to maintain the regulated voltage at a substantially constant value in response to a current drawn by the digital circuitry.
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Citations
26 Claims
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1. A voltage regulator configured to receive a supply voltage from a voltage supply and provide a regulated voltage to digital circuitry, the voltage regulator comprising:
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first circuitry configured to inhibit high frequency energy generated by the digital circuitry from transmitting into the voltage supply; second circuitry configured to inhibit low frequency energy generated by the digital circuitry from transmitting into the voltage supply; and third circuitry, having two current sources and two transistors respectively connected to the two current sources, configured to maintain the regulated voltage at a substantially constant value in response to a first current drawn by the digital circuitry. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method performed by a voltage regulator that includes current sources and transistors, the method comprising:
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receiving a supply voltage from a voltage supply; providing a regulared voltage to first circuitry; inhibiting high frequency energy generated by the first circuitry using the regulated voltage from transmitting into the voltage supply; inhibiting low frequency energy generated by the first circuitry using the regulated voltage from transmitting into the voltage supply; and maintaining the regulated voltage at a substantially constant value in response to a first current drawn by the first circuitry, using two of the current sources respectively connected to two of the transistors. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A system comprising:
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circuitry; and a voltage regulator circuitry, having two current sources and two transistors respectively connected to the two current sources, configured to receive a supply voltage from a voltage supply and provide a regulated voltage to the circuitry; wherein the voltage regulator is configured to inhibit high frequency energy generated by the circuitry from transmitting into the voltage supply, wherein the voltage regulator is configured to inhibit low frequency energy generated by the circuitry from transmitting into the voltage supply, and wherein the voltage regulator is configured to maintain the regulated voltage at a substantially constant value in response to a first current drawn by the circuitry. - View Dependent Claims (21, 22)
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23. A communications device comprising:
an antenna; a mobile communications system configured to communicate with a remote host using the antenna and including a voltage supply, circuitry, and a voltage regulator configured to receive a supply voltage from the voltage supply and provide a regulated voltage to the circuitry; and an input/output system configured to communicate with the mobile communications system; wherein the voltage regulator circuitry has two current sources and two transistors respectively connected to the two current sources and is configured to inhibit high frequency energy generated by the circuitry from transmitting into the voltage supply, wherein the voltage regulator is configured to inhibit low frequency energy generated by the circuitry from transmitting into the voltage supply, and wherein the voltage regulator is configured to maintain the regulated voltage at a substantially constant value in response to a first current drawn by the circuitry. - View Dependent Claims (24, 25, 26)
Specification