Aura Semiconductor Pvt. Ltd

Hariharan Srinivasan

Shyam Somayajula

Arnold J D'Souza

A DC-DC converter includes an inductor, and generates a regulated voltage from a power source. The current flow through the inductor is increased at a first rate in a first interval. In a second interval, the current flow through the inductor is either increased at a second rate or decreased at a third rate depending on whether the regulated voltage is required to be respectively less than or greater than a voltage of the power source. The current flow through the inductor is decreased at a fourth rate in a third interval. The sequence formed by the first interval, the second interval and the third interval is repeated, and followed for all values of the regulated voltage from a lower threshold to higher threshold. The higher threshold has a value greater than the voltage of the power source. The lower threshold is zero volts.

Operating mode for a DC-DC converter to obtain a broad range of output voltages

A power amplifier containing a DC-DC converter, a linear amplifier and a control block. The DC-DC converter receives power from a power source and generates a regulated power supply voltage whose magnitude is controlled by the magnitude of a control signal provided to the DC-DC converter. The linear amplifier receives an input signal and generates a power-amplified output signal, and receives the regulated power supply voltage for operation. The control block is coupled to receive the input signal, and generates the control signal with a magnitude based on the amplitude of the input signal. The regulated power supply voltage is modulated based on the amplitude of the input signal, for peak-to-peak amplitudes of the power-amplified output greater than or less than or equal to the magnitude of the power source. High efficiency for the power amplifier is thereby obtained.

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Chennai, India

Hariharan Srinivasan