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US 9,979,396 B1Granted
Bidirectional analog multiplexer
AssigneeSTMicroelectronics (Grenoble 2) SAS
InventorsThierry Masson, Pawel Fiedorow
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Abstract
An analog multiplexer includes inputs and one output. A switching circuit is coupled between each input and the output. Each switching circuit includes an NMOS switching module, having an on state and an off state, and a control module supplied by a first supply voltage and operating to reduce leakage currents of the NMOS switching module when in the off state. The control module further operates to make the first NMOS switching module bidirectional irrespective of voltages present at the input and at the output.
Claims17
An analog multiplexer, comprising:
- a plurality of inputs and one output;
- a plurality of switching circuits, each switching circuit respectively coupled between one of the inputs and the output;
- wherein each switching circuit comprises:
- a first switching module of an NMOS type, having an on state and an off state, and
- a first control module configured to receive a first supply voltage and operate to reduce the leakage currents of the first switching module when the first switching module is in its off state;
- wherein the first control module is further configured to make the first switching module bidirectional irrespective of voltages present at the corresponding input and output.
3 more elements
Dependencies are inferred from the claim text.