Wide-Bandwidth Linear Regulator
First Claim
1. A linear regulator comprising:
- a first feedback loop characterized by a first bandwidth and a first gain, the first feedback loop including a first amplifier characterized by an output impedance which is significantly reduced in order to maximize the bandwidth of the first feedback loop when driving the capacitance of a control input of a series pass element; and
a second feedback loop characterized by a second bandwidth and a second gain, the second feedback loop including a second amplifier that controls the current in the first amplifier in the first feedback loop.
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Abstract
A linear regulator and a method of regulating a supply voltage are provided. Embodiments include a linear regulator with a first feedback loop and a second feedback loop. The first feedback loop is characterized by a first bandwidth and a first gain. The first feedback loop includes a first amplifier characterized by an output impedance which is significantly reduced in order to maximize the bandwidth of the first feedback loop when driving the capacitance of a control input of a series pass element. The second feedback loop is characterized by a second bandwidth and a second gain. The second feedback loop includes a second amplifier that controls the current in the first amplifier in the first feedback loop.
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Citations
16 Claims
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1. A linear regulator comprising:
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a first feedback loop characterized by a first bandwidth and a first gain, the first feedback loop including a first amplifier characterized by an output impedance which is significantly reduced in order to maximize the bandwidth of the first feedback loop when driving the capacitance of a control input of a series pass element; and a second feedback loop characterized by a second bandwidth and a second gain, the second feedback loop including a second amplifier that controls the current in the first amplifier in the first feedback loop. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of regulating a supply voltage, the method comprising:
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regulating, by a first feedback loop of a linear regulator, the output voltage of the linear regulator, the first feedback loop including a first amplifier characterized by an output impedance which is significantly reduced in order to maximize the bandwidth of the first feedback loop when driving the capacitance of a control input of a series pass element; and regulating, by a second feedback loop of the linear regulator, the output voltage of the linear regulator, the second feedback loop characterized by a second bandwidth and a second gain, the second feedback loop including a second amplifier that controls the current in the first amplifier in the first feedback loop. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification