Texas Instruments Corporation

Per Torstein Røine

Danielle Griffith

Rajat Chauhan

Keith Edmund Kunz

Vipul Kumar Singhal

Jan-Tore Marienborg

An electronic device comprises a regulator, and an oscillator and a resistor coupled to the regulator. The electronic device further comprises a feedback controller that includes a differential amplifier coupled between the oscillator, the resistor, and the regulator. The feedback controller is configured to apply a control voltage to the regulator in response to a resistor voltage upon the resistor and an oscillator voltage upon the oscillator. The feedback controller can be coupled to control a substantially equal voltage upon the resistor and the oscillator.

Oscillator closed loop frequency control

Methods and apparatus for DC-DC power controller with low standby current and fast transient response. In an example arrangement, an apparatus includes a voltage converter outputting a direct current output voltage, configured to increase the output voltage responsive to an enable control signal; at least one feedback comparator configured to output a first control signal, the feedback comparator being active responsive to an edge at a clock signal input; an adjustable frequency oscillator for outputting a first clock signal; and a fast transient detect circuit configured to output a second signal asynchronously upon detecting a rapid change greater than a voltage threshold in the output voltage; the voltage converter receiving the enable control signal when either the first clock signal is active, or the second signal is active and the output voltage is less than a reference voltage. Additional apparatus and methods are disclosed.

Methods and apparatus for a low standby current DC-DC power controller with improved transient response

Various apparatuses, methods and systems for frequency dividing a clock signal are disclosed herein. For example, some embodiments of the present invention provide an apparatus including a plurality of multiplexers connected in series with the clock signal, each having a plurality of inputs of different phase delays. The apparatus also includes a delta sigma modulator connected to control inputs on the plurality of multiplexers. The delta sigma modulator is adapted to repeatedly select different ones of the pluralities of inputs of different phase delays in the plurality of multiplexers to change a divide ratio between the clock signal and an output of the plurality of multiplexers. The apparatus also includes a multiplexer usage accumulator connected to the delta sigma modulator to track usage of the plurality of multiplexers. The apparatus also includes a scrambler circuit connected between the delta sigma modulator and the control inputs on the plurality of multiplexers, adapted to control settings in the plurality of multiplexers based at least in part on the multiplexer usage accumulator.

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Oslo, Norway

Per Torstein Røine