Tritech Microelectronics International Ltd.

Alvin Liw Hock

Eng Yue Ong

Geng Xia

A multiplexed analog-to-digital converter to accept multiple dissimilar analog input signals and convert each analog input signal to a digital code that represents the ratio of the magnitude of the analog input signal to the difference of an upper reference voltage source and a lower reference voltage source is disclosed. The upper reference voltage source is selected by an analog multiplexer from a set of voltage reference sources that include the power supply voltage source of the analog-to-digital converter for analog input signals that are reference to the power supply voltage source, and a precision reference voltage source that is referenced to the band-gap of silicon to provide an absolute measurement of the analog input signal. The lower reference voltage source is selected by a multiplexer from such references as a ground reference source.

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Singapore, Singapore

Alvin Liw Hock