Apparatus and method for voltage distribution
AssigneeSkyworks Solutions, Inc.
InventorsKarl J. Couglar, Ryan Michael Pratt, David Kennedy Homol
Life of this patent
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Abstract
Apparatus and methods for regulated voltage distribution are disclosed. Distribution elements can pass a regulated voltage provided by a single voltage regulator to thereby distribute the regulated voltage. A distribution element of the distribution elements can be included in a feedback path that provides a feedback signal to an input of the voltage regulator. The voltage regulator can be a low dropout voltage regulator, for example. The regulated voltage can be used in a variety of applications, for example, as a bias voltage for a power amplifier.
Claims21
(canceled)
An electronic system with voltage distribution, the electronic system comprising:
- a low dropout voltage regulator including an error amplifier and a pass transistor electrically connected to an output of the error amplifier, the pass transistor configured to provide a regulated voltage;
- and
- a voltage distribution circuit configured to receive the regulated voltage from the pass transistor, the voltage distribution circuit including a first distribution element and a second distribution element, the first distribution element configured to pass the regulated voltage in a first mode, the first distribution element being included in a feedback loop to an input of the low voltage dropout regulator in the first mode, and the second distribution element configured to pass the regulated voltage in a second mode.
A method of regulated voltage distribution, the method comprising:
- generating a regulated voltage with a low dropout regulator, the low dropout regulator including an error amplifier and a pass transistor electrically connected to an output of the error amplifier;
- passing the regulated voltage with a first distribution element in a first mode, the first distribution element configured to receive the regulated voltage from the pass transistor;
- providing a feedback signal to an input of the low dropout regulator with a feedback loop in the first mode, the feedback loop including the first distribution element;
- and
- passing the regulated voltage with a second distribution element in a second mode, the second distribution element configured to receive the regulated voltage from the pass transistor.
An electronic apparatus with variable voltage distribution, the electronic apparatus comprising:
- means for generating a regulated voltage based on a power supply voltage and a comparison of a reference voltage with a feedback signal generated based on the regulated voltage, the reference voltage being different than the power supply voltage;
- means for generating variable regulated voltages from the regulated voltage, the variable regulated voltages being at different voltage levels when one or more loads configured to receive at least one of the variable regulated voltages operate in different power modes;
- and
- means for selectively distributing the regulated voltage to the means for generating the variable regulated voltages, the means for selectively distributing configured to electrically couple the regulated voltage to only a portion of the one or more loads via the means for generating the variable regulated voltages in a selected one of the different power modes.
Dependencies are inferred from the claim text.