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US 2019/0158107 A1Published application
Analog-to-digital converter
AssigneeTexas Instruments Incorporated
InventorZhenyong Zhang
Life of this patent
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Abstract
A system includes an analog-to-digital converter receiving input signals. One particular input signal has a particular analog value, and the analog-to-digital converter uses a fixed reference to convert the particular analog value to a particular digital value. The analog-to-digital converter uses the particular analog value as a reference for converting the analog values of the remaining input signals.
Claims16
A system, comprising:
- a multiplex circuit having:
- a plurality of inputs to receive a respective plurality of analog signals, including a first input to receive a first analog signal;
- and an output to provide an output signal, multiplexed from among the received analog signals;
- and
- an analog-to-digital converter (ADC) to convert the output signal, relative to a reference voltage, into a corresponding digital value, wherein:
- if the output signal is the first analog signal, then the reference voltage is a fixed voltage;
- and if the output signal is other than the first analog signal, then the reference voltage is a variable voltage of the first analog signal.
4 more elements
A method of operating an analog-to-digital converter (ADC), the method comprising:
- receiving a plurality of analog signals via a respective plurality of inputs of a multiplex circuit, including receiving a first analog signal via a first input of the multiplex circuit;
- providing an output signal from an output of the multiplex circuit, the output signal being multiplexed from among the received analog signals;
- with the ADC, converting the output signal, relative to a reference voltage, into a corresponding digital value, wherein:
- if the output signal is the first analog signal, then the reference voltage is a fixed voltage;
- and if the output signal is other than the first analog signal, then the reference voltage is a variable voltage of the first analog signal.
2 more elements
A system, comprising:
- a first multiplex circuit including:
- a plurality of inputs to receive a respective plurality of analog signals, including a first input to receive a first analog signal;
- and
- a first output to provide a first output signal, multiplexed from among the received analog signals;
- a second multiplex circuit including:
- a first input to receive the first analog signal;
- a second input to receive a fixed voltage;
- and
- a second output to provide a reference voltage, wherein:
- if the first output signal is the first analog signal, then the reference voltage is the fixed voltage;
- and
- if the first output signal is other than the first analog signal, then the reference voltage is a variable voltage of the first analog signal;
- and
- an analog-to-digital converter (ADC) including:
- a first input to receive the first output signal;
- a second input to receive the reference voltage;
- and
- an output to convert the first output signal into a corresponding digital value based on the reference voltage.
15 more elements
Dependencies are inferred from the claim text.