Integrated curcuit with conductance adjustable by digital control signal
First Claim
1. An integrated circuit comprising at least one first conductance (6) adjustable by means of a digital control signal (17) encoding steps in value for the quantization of an exact value with a fixed relative accuracy, the first conductance (6) further comprising first elementary conductances each of which define a step in value, each first elementary conductance being dimensioned so that a single level of the value of the first conductance (6) corresponds to two successive levels of the value of the digital control signal (17), means for enabling a corresponding first elementary conductance when the first of the two levels of value of the digital control signal (17) results in a value which is lower than the exact value and for disabling a corresponding first elementary conductance when the first of the two levels of value of the digital control signal results in a value which is higher than the exact value.
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Accused Products
Abstract
The integrated circuit includes at least one conductance (6) which is adjustable by a digital control signal (17) which encodes steps in value for quantizing an exact value to within a fixed relative accuracy Δp. The conductance (6) includes elementary conductances which each define a step in value such that each elementary conductance is dimensioned so that a single level in value of the conductance (6) corresponds to two successive levels of the value of the digital control signal (17). If the result from the first of the two levels of value of the digital control signal (17) is a value which is lower, or respectively higher, than the exact value, the corresponding elementary conductance is enabled, or respectively disabled. Accordingly, the adjusted total value of the conductance (6) is equal to the exact value to within the same relative accuracy Δp, without oscillating between two values straddling this exact value. It is possible to use this type of conductance in high frequency communication integrated circuits.
17 Citations
7 Claims
- 1. An integrated circuit comprising at least one first conductance (6) adjustable by means of a digital control signal (17) encoding steps in value for the quantization of an exact value with a fixed relative accuracy, the first conductance (6) further comprising first elementary conductances each of which define a step in value, each first elementary conductance being dimensioned so that a single level of the value of the first conductance (6) corresponds to two successive levels of the value of the digital control signal (17), means for enabling a corresponding first elementary conductance when the first of the two levels of value of the digital control signal (17) results in a value which is lower than the exact value and for disabling a corresponding first elementary conductance when the first of the two levels of value of the digital control signal results in a value which is higher than the exact value.
Specification