Low power and wide dynamic range analog-to-digital converter
AssigneeAmbiq Micro, Inc.
InventorsYousof Mortazavi, Roger Serwy
Life of this patent
Estimating the term…
Abstract
A low power high bandwidth analog to digital converter system is disclosed. A first analog signal input receives an input signal. A first programmable gain amplifier receives the input signal. An analog to digital converter (ADC) is coupled to the output of the first programmable gain amplifier and samples the input signal for conversion to a digital signal. A controller is coupled to the ADC and the first programmable gain amplifier. The controller selects and enables either a reduced power mode or a power up mode for the first programmable gain amplifier and the ADC. The power up mode is selected and enabled when the input signal is to be sampled to operate the first programmable gain amplifier and the ADC to sample the input signal.
Claims19
A low power analog to digital converter system comprising:
- a first analog signal input receiving an input signal;
- a first programmable gain amplifier receiving the input signal;
- an analog to digital converter (ADC) coupled to an output of the first programmable gain amplifier and providing a digital output signal;
- and
- a controller coupled to the first programmable gain amplifier and the ADC, the controller selecting and enabling either a reduced power mode or a power up mode for the first programmable gain amplifier and the ADC, wherein the power up mode is selected and enabled when the input signal is to be sampled to operate the first programmable gain amplifier and the ADC to sample the input signal;
- and
- a buffer coupled between the output of the first programmable gain amplifier and the ADC, the buffer having a high bandwidth to enable fast settling of the input signal, wherein the controller selects and enables the power up mode for the buffer when the input signal is to be sampled.
A system on chip for audio processing, the system on chip comprising:
- an audio data input receiving an audio input signal;
- a first programmable gain amplifier receiving an audio input signal from the audio data input;
- an analog to digital converter (ADC) coupled to the output of the programmable gain amplifier and providing a digital output signal;
- and
- a controller coupled to the first programmable gain amplifier and ADC, the controller selecting and enabling either a reduced power mode or a power up mode for the first programmable gain amplifier and the ADC, wherein the power up mode is selected and enabled when the audio input signal is to be sampled to operate the first programmable gain amplifier and the ADC to sample the audio input signal;
- and
- a buffer coupled between the output of the first programmable gain amplifier and the ADC, the buffer having a high bandwidth to enable fast settling of the input signal, wherein the controller selects and enables the power up mode for the buffer when the input signal is to be sampled.
Dependencies are inferred from the claim text.