Method and apparatus for reducing a noise differential in an ele

Details Method and apparatus for reducing a noise differential in an ele Method and apparatus for reducing a noise differential in an ele

1997-03-11

1999-08-24

Nelms, David

Oscillators

Solid state active element oscillator

Transistors

331108C, 331116FE, H03B 512

Patent

active

059429518

ABSTRACT:
In a high current, high frequency integrated circuit chip characteristic of producing an excess of internal on-chip circuit induced noise with respect to a low current, low frequency circuit implemented on the high current, high frequency integrated circuit chip, a method is disclosed for reducing noise in the low current, low frequency circuit. The method includes placing noise sensitive components of the low current, low frequency circuit external to the integrated circuit chip, corresponding to an off-chip placement. An exclusive power supply reference line V.sub.(REF) tapped off of a power supply bus internal to the integrated circuit chip is provided. The exclusive power supply reference line V.sub.(REF) is tapped off the internal power supply bus on-chip at a physical location proximate the low current, low frequency circuit and routed off-chip. The noise sensitive components are connected between the low current, low frequency circuit and the power supply reference line V.sub.(REF), wherein a noise differential in a power supplied to the low current, low frequency circuit on-chip and a power supplied to the noise sensitive components off-chip is minimized. An integrated circuit arrangement is also disclosed.

REFERENCES:
patent: 3593042 (1971-07-01), Cook, Jr.
patent: 4827226 (1989-05-01), Connell
patent: 5369377 (1994-11-01), Benhamida
patent: 5453719 (1995-09-01), Narahara
patent: 5535152 (1996-07-01), Han et al.

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