Method of controlling reader amplifier gain variations of a...

Details Method of controlling reader amplifier gain variations of a... Method of controlling reader amplifier gain variations of a...

2006-08-01

2006-08-01

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

C360S066000

Reexamination Certificate

active

07085088

ABSTRACT:
An amplifier (70) has a differential input stage (84,86). An output transistor (102) is connected to receive a single ended output developed by transistor86. First (74) and second (76) current sources are connected to establish respective first and second currents in the input differential transistors (84,86) according to a predetermined ratio. First and second voltages are subtracted from the differential inputs (VM,VP) in respective differential amplifiers (88,90), and the output is derived from the output transistor having a magnitude proportional to an inverse of a product of a square of the reference resistance, a carrier mobility, and an oxide capacitance.

REFERENCES:
patent: 5323124 (1994-06-01), Ikeda
patent: 5481180 (1996-01-01), Ryat
patent: 5694083 (1997-12-01), Umeyama et al.
patent: 5781360 (1998-07-01), Wilson et al.
patent: 5969569 (1999-10-01), Marceau et al.
patent: 6204980 (2001-03-01), Momtaz et al.
patent: 6282046 (2001-08-01), Houston et al.
patent: 6337778 (2002-01-01), Gagne
patent: 6549072 (2003-04-01), Vernon
“Microelectronic Circuits” 4th Ed., 1998, Sedra/Smith, pp. 354-416.
Neamen, Electronic Circuit Analysis and Design, WCB McGraw-Hill, 1996, p. 403.
Pan et al, A Wide-Band CMOS Read Amplifier for Magnetic Data Storage Systems, IEEE J of Solid-State Circuits, vol. 27, No. 6, Jun. 1992 pp. 863-873.

Affiliated with

Also associated with

Rating

Method of controlling reader amplifier gain variations of a... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of controlling reader amplifier gain variations of a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of controlling reader amplifier gain variations of a... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3654879