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US 10,833,695 B2Granted
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.
Claims7
A system, comprising:
- a multiplex circuit having inputs and an output, the inputs including a first input, and the multiplex circuit configured to:
- receive analog signals at the inputs, including a first analog signal at the first input;
- and provide an output signal at the output, in which the output signal is multiplexed from among the received analog signals;
- and
- an analog-to-digital converter (ADC) having an analog input, a reference voltage input and a digital output, the analog input coupled to the multiplex circuit's output, and the ADC configured to convert the output signal, relative to a reference voltage at the reference voltage input, into a digital value at the digital output, in which:
- 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
Dependencies are inferred from the claim text.