Miscellaneous active electrical nonlinear devices – circuits – and – Gating – Parallel controlled paths
Patent
1996-02-07
1997-07-29
Tran, Toan
Miscellaneous active electrical nonlinear devices, circuits, and
Gating
Parallel controlled paths
327334, 327427, H03K 1762, H03K 17687
Patent
active
056525389
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 .DELTA.p. 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 .DELTA.p, without oscillating between two values straddling this exact value. It is possible to use this type of conductance in high frequency communication integrated circuits.
REFERENCES:
patent: 4667337 (1987-05-01), Fletcher
patent: 4707620 (1987-11-01), Sullivan
patent: 5039879 (1991-08-01), Parrish
patent: 5552744 (1996-09-01), Burlison et al.
patent: 5589789 (1996-12-01), Kamiya
Boudry Jean-Marie
Chamoun Sleiman
Bull S.A.
Kondracki Edward J.
Tran Toan
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