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1. 发明申请

US20220360272A1 ANALOG TO DIGITAL CONVERTER AND A METHOD FOR ANALOG TO DIGITAL CONVERSION 有权
公开(公告)号：US20220360272A1
公开(公告)日：2022-11-10
申请号：US17302588
申请日：2021-05-06
申请人： Apple Inc
发明人： Andrei Levi , Tiberiu Carol Galambos
IPC分类号： H03M1/06
摘要： An analog to digital converter (ADC) that may include an input configured to receive a first signal and a second signal; a signal generator that is configured to generate multiple signals, the multiple signals may include a phase-shifted clock signals that are phase shifted from each other, first pulse width modulation (PWM) related signals indicative of a value of the first signal, second PWM related signals indicative of a value of the second signals, a first sampled stream, a second stream that have substantially opposite phases, and phase related signals related to the first sampled stream and the second sampled stream; wherein the first sampled stream and the second sampled stream are generated based on at least one of the phase shifted clock signals; and a processing unit that is configured to receive at least some of the multiple signals, the at least some of the multiple signals may include the first PWM related signals, the second PWM related signals, and the phase related signals; generate, based on the at least some of the multiple samples, virtual counter values and virtual phase values that are mutually aligned; determine a value of a difference between the first signal and the second signal, and output an ADC output signal indicative of the difference between the first signal and the second signal.

2. 发明授权

US11588492B2 Analog to digital converter and a method for analog to digital conversion 有权
公开(公告)号：US11588492B2
公开(公告)日：2023-02-21
申请号：US17872055
申请日：2022-07-25
申请人： Apple Inc.
发明人： Andrei Levi , Tiberiu Carol Galambos
IPC分类号： H03M1/06 , H03M1/10
摘要： An analog to digital converter (ADC) receives first and second analog input signals. A charge sampling demultiplexer includes multiple capacitors that sample the first and second analog input signals, and generates multiple input samples representative of charge stored on the capacitors. A plurality of sub-ADCs each include first and second charge-to-time converters, which receive from the charge sampling demultiplexer respective first and second input sample of the first and second analog input signals and output respective first and second pulse-width-modulated (PWM) signals responsively to the respective first and second input samples. Temporal processing circuitry processes the PWM signals to generate a digital value indicative of a temporal difference between the first and second PWM signals. Output reordering circuitry receives the digital value from each of the sub-ADCs and generates a digital output indicative of a difference between the first and second analog input signals.

3. 发明申请

US20220360273A1 Analog to digital converter and a method for analog to digital conversion 有权
公开(公告)号：US20220360273A1
公开(公告)日：2022-11-10
申请号：US17872055
申请日：2022-07-25
申请人： Apple Inc.
发明人： Andrei Levi , Tiberiu Carol Galambos
IPC分类号： H03M1/06
摘要： An analog to digital converter (ADC) receives first and second analog input signals. A charge sampling demultiplexer includes multiple capacitors that sample the first and second analog input signals, and generates multiple input samples representative of charge stored on the capacitors. A plurality of sub-ADCs each include first and second charge-to-time converters, which receive from the charge sampling demultiplexer respective first and second input sample of the first and second analog input signals and output respective first and second pulse-width-modulated (PWM) signals responsively to the respective first and second input samples. Temporal processing circuitry processes the PWM signals to generate a digital value indicative of a temporal difference between the first and second PWM signals. Output reordering circuitry receives the digital value from each of the sub-ADCs and generates a digital output indicative of a difference between the first and second analog input signals.

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