Signaling dependent adaptive analog-to-digital converter (ADC) system and method of using same
AssigneeFreescale Semiconductor, Inc.
InventorsRaul Salvi, John J. Parkes, Jr., James J. Riches
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Abstract
An adaptive analog-to-digital converter (ADC) system (100) includes an automatic gain control (AGC) controller (101) for receiving both in-band and out-of-band signals from a radio frequency (RF) receiver and producing an AGC control signal therefrom. A digital signal processor (DSP) (103) is then used for interpreting the AGC control signal and providing an adjustment signal to an ADC (105). The ADC (105) uses the adjustment signal to dynamically control efficiency of the ADC system 100 by adjusting bit resolution, reference capacitance and bias based upon the RF signal received and desired protocol requirements presented to the AGC controller (101).
Claims24
An adaptive analog-to-digital converter (ADC) system comprising:
- an automatic gain control (AGC) controller for receiving both in-band and out-of-band signals from a radio frequency (RF) receiver and producing an AGC control signal therefrom;
- a digital signal processor (DSP) for interpreting the AGC control signal and providing at least one adjustment signal to an ADC;
- and
- wherein the ADC uses the at least one adjustment signal to control current drain based upon an RF signal received by the AGC controller.
An adaptive analog-to-digital converter (ADC) system that utilizes digital signal processing to control operational parameters of an ADC comprising:
- an automatic gain control (AGC) controller for receiving at least one input signal from a radio frequency (RF) receiver and providing an AGC control signal in response thereto;
- a digital signal processor (DSP) for receiving the AGC control signal and providing at least one adaptive ADC control signal based on desired communication protocol requirements;
- and
- an ADC for converting received analog input signals to a digital format and dynamically controlling current drain based upon the at least one adaptive control signal.
A method for adjusting the operational parameters of an analog-to-digital converter (ADC) for providing optimal performance with minimum current drain comprising the steps of:
- receiving a radio frequency (RF) input signal from a receiver;
- producing at least one automatic gain control (AGC) signal from the received RF input signal;
- processing the AGC (control) signal using a digital signal processor to provide at least one adjustment control signal;
- and
- receiving the at least one adjustment control signal at an ADC where the at least one adjustment control signal is used to control functionality of the ADC to maximize efficiency based upon the received RF input signal.
Dependencies are inferred from the claim text.