Abstract:
Circuits and methods that improve the performance of voltage reference driver circuits and associated analog to digital converters are provided. A voltage reference driver circuit that maintains a substantially constant output voltage when a load current is modulated by an input signal is provided. The voltage reference driver circuit synchronously decouples a voltage regulation circuit from the load circuit when modulating events such as pulses caused by the load circuit during a switching interval are generated, preventing disturbance of the regulation circuitry and keeping its output voltage substantially constant.
Abstract:
Circuits and methods that improve the performance of voltage reference driver circuits and associated analog to digital converters are provided. A voltage reference driver circuit that maintains a substantially constant output voltage when a load current is modulated by an input signal is provided. The voltage reference driver circuit synchronously decouples a voltage regulation circuit from the load circuit when modulating events such as pulses caused by the load circuit during a switching interval are generated, preventing disturbance of the regulation circuitry and keeping its output voltage substantially constant.
Abstract:
An analog-to-digital converter, ADC, system (200) configured to receive a first (V1) and a second (V2) analog quantity and to provide a plurality of numerical parameters (CODE) representative of the first (V1) and second (V2) analog quantities. The ADC system includes a first (301), a second (302), and a third (305) ADC circuit, and a digital interface circuit (303). The first ADC circuit (301) is configured to provide a first code (D1) representative of the first analog quantity (V1) and to provide a first analog residue quantity (R1) representative of the first analog quantity (V1) with respect to the first code (D1). The second ADC circuit (302) is configured to provide a second code (D2) representative of the second analog quantity (V2) and to provide a second analog residue quantity (R2) representative of the second analog quantity (V2) with respect to the second code (D2). The third ADC circuit (304) is configured to receive the first (R1) and second (R2)analog residue quantities, and to provide a third digital code (D3) representative of a difference of the first (R1) and second (R2) analog residue quantities. The digital interface circuit (303) is configured to receive the first (D1), second (D2), and third (D3) codes, and to provide the plurality of numerical parameters (CODE) representative of the first (V1) and second (V2) analog quantities.
Abstract:
An analog-to-digital converter system and methodology comprising an analog-to-digital converter circuit configured to provide sequentially a plurality of codes designating a numerical value in a first number system. The analog-to-digital converter system further comprising an encoder interface circuit configured to receive the plurality of codes and to derive a redundant digital representation. A portion of the redundant digital representation is transmitted during the conversion period. The encoder interface circuit may be configured to use a numerical successive-approximation algorithm to derive the redundant digital representation. A substantial portion of the redundant digital representation may be transmitted via a serial interface during the conversion period to reduce an overall latency.
Abstract:
An analog-to-digital converter (ADC) system and method. The ADC system in accord with one embodiment includes a sampling digital-to-analog converter configured to sample a combination of an analog signal value and an analog dither value, and a control circuit comprising a mismatch-shaping encoder. The control circuit is configured to sequentially apply a plurality of digital codes to the sampling digital-to-analog converter during an analog-to-digital conversion operation to derive a digital code representing the combination of the analog signal value and the analog dither value. Several embodiments are presented.
Abstract:
An analog-to-digital converter (ADC) system and method. The ADC system in accord with one embodiment includes a sampling digital-to-analog converter configured to sample a combination of an analog signal value and an analog dither value, and a control circuit comprising a mismatch-shaping encoder. The control circuit is configured to sequentially apply a plurality of digital codes to the sampling digital-to-analog converter during an analog-to-digital conversion operation to derive a digital code representing the combination of the analog signal value and the analog dither value. Several embodiments are presented.