Patent ID: 8618959

Claim:
A switching circuitry, comprising: a first bank of selectively actuatable switches coupled between a supply terminal and a first decoding terminal, each switch connected in series with one of a first plurality of components to form a switching path, the switching paths formed by the first bank and the first plurality of components connected in parallel, the switching circuitry configured to apply to the first decoding terminal an analog signal having a first value dependent upon which switches within the first bank are actuated; a second bank of selectively actuatable switches coupled between the supply terminal and a second decoding terminal, each switch connected in series with one of a second plurality of components to form a switching path, the switching paths formed by the second bank and the second plurality of components connected in parallel, the switching circuitry configured to apply to the second decoding terminal an analog signal having a second value dependent upon which switches within the second bank are actuated; and a store configured to hold one or more patterns corresponding to the first and second values, wherein the store is updated when the first and second values change as a result of a change in which of the switches are actuated, wherein, when a plurality of the switches within the first bank and a plurality of the switches within the second bank are actuated in a combination, a relationship between the first and second values is unique to the combination of actuated switches.