H - Electricity – 03 – F
Patent
H - Electricity
03
F
328/175, 330/38
H03F 3/04 (2006.01) H03F 1/30 (2006.01) H03F 3/45 (2006.01)
Patent
CA 1165826
PHN 9689 ABSTRACT: An integrated circuit comprising a plurality of adjustable voltage-current converters, of which one con- verter is employed as a reference converter. The refer- ence converter is included in a control loop. To the input of the reference converter an input voltage is applied in that a first current is passed through a refer- ence resistor connected to said input. A second current, which is in a fixed ratio to said first current, is com- pared with the output current of the reference converter and this reference converter is then biassed so that its output current corresponds to said second current. In this way the transconductance of the reference converter is determined by the reference resistor and the ratio of the first and the second current, so that this transcon- ductance is highly independent of process, temperature and supply-voltage variations. The other converters are biassed by signals derived from the bias signals for the reference converter and thus have corresponding transcon- ductances.
371238
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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