Trimming resistor network
AssigneeKabushiki Kaisha Toshiba
InventorsKaoru Imamura, Wataru Takahashi
Life of this patent
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Abstract
A trimming resistor network includes first and second external connection terminals, a first resistor having two ends acting as first and second connection terminals, a first coupling body for connecting the first external connection terminal to the first connection terminal via series-connected resistors, a second coupling body for connecting the second external connection terminal to the second connection terminal directly or via series-connected resistors, and parallel trimming resistors having two ends respectively connected to the first and second coupling bodies. The combined resistance between the first and second external connection terminals is increased by substantially a preset amount each time one of the parallel trimming resistors is cut off.
Claims9
A trimming resistor network comprising:
- a pre-stage 4-terminals circuit block having first and second input terminals;
- a plurality of succeeding-stage 4-terminals circuit blocks cascade-connected with said pre-stage 4-terminals circuit block, an internal circuit construction of at least part of said plurality of succeeding-stage 4-terminal circuit blocks being different from an internal circuit construction of said pre-stage 4-terminal circuit block, and the final stage of said succeeding-stage 4-terminal circuit block having first and second output terminals;
- and
- a load circuit terminating said first and second output terminals,
- wherein the internal circuit construction of at least part of said plurality of succeeding-stage 4-terminal circuit blocks includes a trimming resistor element which is cut off by a predetermined trimming operation.
A trimming resistor network comprising:
- first and second external connection terminals;
- a first resistor having two ends acting as first and second connection terminals;
- a first coupling body connecting said first external connection terminals to said first connection terminals via series-connected resistors;
- a second coupling body connecting said second external connection terminal to said second connection terminal directly or via series-connected resistors;
- and
- parallel trimming resistors having two ends respectively connected to said first and second coupling bodies;
- wherein the combined resistance between said first and second external connection terminals is increased by substantially a preset amount each time one of said parallel trimming resistors is cut off.
Dependencies are inferred from the claim text.