Programmable output impedance for hard drive preamplifier...

Details Programmable output impedance for hard drive preamplifier... Programmable output impedance for hard drive preamplifier...

2006-08-15

2006-08-15

Young, Wayne (Department: 2627)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

Reexamination Certificate

active

07092189

ABSTRACT:
A write driver output circuit having a programmable output impedance. A plurality of amplifiers are disposed in parallel between an input and an output of an impedance matching section of the write driver circuit and can be selectively enabled to correspondingly set the output impedance of the write driver circuit. The amplifiers may be Class AB amplifiers, each of which have a smaller size than an conventional AB used in a single amplifier write driver circuit. Each of the Class AB amplifiers has a corresponding matching resistor, and a current source, each being selectively enabled and disabled by enabling and disabling, respectively, the corresponding current sources, such as through the use of serial interface bits.

REFERENCES:
patent: 6084378 (2000-07-01), Carobolante
patent: 6487034 (2002-11-01), Jiang et al.
patent: 6549044 (2003-04-01), Brambilla et al.
patent: 6621469 (2003-09-01), Judd et al.

Affiliated with

Also associated with

Rating

Programmable output impedance for hard drive preamplifier... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Programmable output impedance for hard drive preamplifier..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Programmable output impedance for hard drive preamplifier... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3706991