Linearization of resistance

Amplifiers – With semiconductor amplifying device – Integrated circuits

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257538, H01L 298605

Patent

active

060182725

ABSTRACT:
A linearized resistor for integrated circuits combines an N-type diffused resistor and a P-type diffused resistor. In one embodiment, the N-type and P-type diffused resistors are connected in series. In another embodiment, the N-type and P-type diffused resistors are connected in parallel. Two or more linearized resistors of the present invention may be used in IC circuits, such as voltage dividers, inverting amplifiers, single-ended operational amplifiers, and single-ended differential operational amplifiers. Linearized resistors of the present invention can be designed to have voltage coefficients smaller than conventional IC resistors having a single diffused resistor. As such, linearized resistors of the present invention can be designed to provide more uniform resistance over their operating voltage range than conventional IC resistors. As a result, linearized resistors of the present invention can be used in differential circuits that are more effective in reducing odd and even harmonics than are conventional differential circuits.

REFERENCES:
patent: 3196668 (1965-07-01), McClellan
patent: 3612535 (1971-10-01), Davis et al.
patent: 4786877 (1988-11-01), Leydier
patent: 5428242 (1995-06-01), Furuya et al.
patent: 5589702 (1996-12-01), Alter
patent: 5614864 (1997-03-01), Stubbe et al.
patent: 5699012 (1997-12-01), Hakkarainen

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