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US 12,712,545 B2Granted
Multi-channel multiplexer
AssigneeTexas Instruments Incorporated
InventorsNitin Agarwal, Kunal Suresh Karanjkar, Venkata Ramanan R
Life of this patent
Estimating the term…
Abstract
A circuit includes a first switch assembly having a first input node and a first output node, and a second switch assembly having a second input node and a second output node. The circuit further includes a third switch assembly an operational amplifier, and a buffer. The third switch assembly has a third input node and a third output node. The third input node is coupled to the second output node, and the third output node is coupled to the first output node. The buffer has a buffer input and a buffer output. The buffer input is coupled to an input stage of the operational amplifier. The buffer output is coupled to the third switch assembly.
Claims20
A circuit, comprising:
- a first switch assembly having a first switch, a second switch, and a third switch, the first and second switches coupled in series through an internal terminal, the third switch coupled to the internal terminal, the third switch configured to be turned off based on the first and second switches being turned on, and the third switch configured to be turned on based on the first and second switches being turned off;
- a second switch assembly having a first switch, a second switch with a first terminal and a second terminal, and a third switch, the first terminal of the second switch directly coupled in series to the first switch through an internal terminal, the third switch coupled to the internal terminal, the third switch configured to be turned off based on the first and second switches being turned on, the third switch configured to be turned on based on the first and second switches being turned off, and the first and second switches configured to be turned off based on the first and second switches of the first switch assembly being turned on;
- a buffer having an input and an output, the input coupled to the second switch of the first switch assembly;
- and
- a third switch assembly having a first switch with a first terminal and a second terminal, a second switch, and a third switch, the second terminal of the first switch directly coupled in series to the second switch through an internal terminal, the third switch between the internal terminal and the output of the buffer, the first terminal of the first switch directly coupled to the second terminal of the second switch of the second switch assembly, the second switch further coupled to the input of the buffer, and the first and second switches configured to be turned on based on the first and second switches of the second switch assembly being turned on.
2 more elements
A system, comprising:
- a first switch assembly having a first switch, a second switch, and a third switch, the first and second switches coupled in series through an internal terminal, and the third switch coupled to the internal terminal;
- a second switch assembly having a first switch, a second switch with a first terminal and a second terminal, and a third switch, the first terminal of the second switch directly coupled in series to the first switch through an internal terminal, and the third switch coupled to the internal terminal;
- a buffer having an input and an output, the input coupled to the second switch of the first switch;
- a third switch assembly having a first switch with a first terminal and a second terminal, a second switch, and a third switch, the second terminal of the first switch directly coupled in series to the second switch through an internal terminal, the third switch between the internal terminal and the output of the buffer, the first terminal of the first switch directly coupled to the second terminal of the second switch of the second switch assembly, and the second switch further coupled to the input of the buffer;
- and
- a controller configured to:
- turn off the third switch of the first switch assembly based on the first and second switches of the first switch assembly being turned on, and turn on the third switch of the first switch assembly based on the first and second switches of the first switch assembly being turned off;
- turn off the third switch of the second switch assembly based on the first and second switches of the second switch assembly being turned on, and turn on the third switch of the second switch assembly based on the first and second switches of the second switch assembly being turned off;
- turn off the first and second switches of the second switch assembly based on the first and second switches of the first switch assembly being turned on;
- and
- turn on the first and second switches of the third switch assembly and turn off the third switch of the third switch assembly based on the first and second switches of the second switch assembly being turned on.
8 more elements
A circuit, comprising:
- a first switch assembly having a first switch with a first terminal and a second terminal, a second switch with a first terminal and a second terminal, and a third switch with a first terminal and a second terminal, the first terminal of the first switch directly coupled to a first input, the second terminal of the first switch directly coupled in series to the first terminal of the second switch through an internal terminal, and the first terminal of the third switch directly coupled to the internal terminal;
- a second switch assembly having a first switch with a first terminal and a second terminal, a second switch with a first terminal and a second terminal, and a third switch with a first terminal and a second terminal, the first terminal of the first switch directly coupled to a second input, the first terminal of the second switch directly coupled in series to the first switch through an internal terminal, and the first terminal of the third switch directly coupled to the internal terminal;
- a third switch assembly having a first switch with a first terminal and a second terminal, a second switch with a first terminal and a second terminal, and a third switch with a first terminal and a second terminal, the second terminal of the first switch directly coupled in series to the second switch through an internal terminal, the first terminal of the third switch directly coupled to the internal terminal, the first terminal of the first switch directly coupled to the second terminal of the second switch of the second switch assembly, and the first and second switches are configured to be turned on based on the first and second switches of the second switch assembly being turned on;
- and
- a buffer having an input and an output, the input directly coupled to the second terminal of the second switch of the first switch assembly and the second terminal of the second switch of the third switch assembly, and the output directly coupled to the second terminal of the third switch of the third switch assembly.
2 more elements
Dependencies are inferred from the claim text.