Integrated circuit waith automatic compensation for deviations o

Details Integrated circuit waith automatic compensation for deviations o Integrated circuit waith automatic compensation for deviations o

1997-03-04

1998-10-13

Hoang, Huan

Oscillators

Solid state active element oscillator

Transistors

331 1R, 331 2, 331 36C, 331186, H03K 3281, H03L 700

Patent

active

058218297

ABSTRACT:
The system includes various circuit units each having a capacitor and a charging circuit for defining a quantity depending upon the ratio (I/C) between the charging current and the capacitance of the capacitors. In order to compensate automatically for deviations of the actual capacitances from the nominal capacitances due to fluctuations in the parameters of the integrated-circuit manufacturing process, the system has a phase-locked loop which uses one of the circuit units as an adjustable oscillator, and current transducer means which regulates the charging currents of the capacitors of the circuit units in dependence on the regulated charging current of the capacitor of the oscillator, or the error current of the PLL loop.

REFERENCES:
patent: Re34317 (1993-07-01), Ikeda
patent: 3857110 (1974-12-01), Grebene
patent: 4131861 (1978-12-01), Malaviya
patent: 4623852 (1986-11-01), Abou et al.
patent: 4904955 (1990-02-01), Ley
patent: 4980653 (1990-12-01), Shepherd
patent: 5233315 (1993-08-01), Verhoeven
patent: 5369376 (1994-11-01), Leblebicioglu
patent: 5459653 (1995-10-01), Seto et al.

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