Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Unwanted signal suppression
Reexamination Certificate
2006-11-21
2006-11-21
Le, Dinh T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Unwanted signal suppression
C327S558000
Reexamination Certificate
active
07138856
ABSTRACT:
A controller that is linearly responsive to an input voltage provides continuously adjustable control of the width of a periodically repeating digital pulse, thereby achieving a linear voltage to duty-cycle ratio transfer function. The circuit of the present invention includes a master clock input, a ratio control voltage input, a controlled duty cycle clock output, a high gain amplifier configured as an integrator having differential inputs, each equipped with a low pass filter, a controlled current source, a resettable timing capacitor, a threshold detector and a reference pulse generator.
REFERENCES:
patent: 3474337 (1969-10-01), Petrick
patent: 3695107 (1972-10-01), Hertz et al.
patent: 3703829 (1972-11-01), Dougherty
patent: 3774488 (1973-11-01), Safiuddin
patent: 3832900 (1974-09-01), Ross
patent: 3995212 (1976-11-01), Ross
patent: 4110692 (1978-08-01), Li
patent: 4359902 (1982-11-01), Lawless
patent: 4489601 (1984-12-01), Rao et al.
patent: 4621264 (1986-11-01), Yashiro et al.
patent: 4672341 (1987-06-01), Axell
patent: 4689578 (1987-08-01), Spychalski
patent: 4797621 (1989-01-01), Anderson
patent: 4843255 (1989-06-01), Stuebing
patent: 4890065 (1989-12-01), Laletin
patent: 5057702 (1991-10-01), Kitagawa et al.
patent: 5124597 (1992-06-01), Stuebing et al.
patent: 5274271 (1993-12-01), McEwan
patent: 5315164 (1994-05-01), Broughton
patent: 5345471 (1994-09-01), McEwan
patent: 5410191 (1995-04-01), Miura
patent: 5422607 (1995-06-01), McEwan
patent: 5438867 (1995-08-01), Va Der Pool
patent: 5457990 (1995-10-01), Oswald et al.
patent: 5517198 (1996-05-01), McEwan
patent: 5519342 (1996-05-01), McEwan
patent: 5543720 (1996-08-01), Edvardsson
patent: 5563605 (1996-10-01), McEwan
patent: 5594449 (1997-01-01), Otto
patent: 5609059 (1997-03-01), McEwan
patent: 5610611 (1997-03-01), McEwan
patent: 5630216 (1997-05-01), McEwan
patent: 5682114 (1997-10-01), Ohta
patent: 5764300 (1998-06-01), Badger
patent: 5792956 (1998-08-01), Li
patent: 5933039 (1999-08-01), Hui et al.
patent: 6055287 (2000-04-01), McEwan
patent: 6060915 (2000-05-01), McEwan
patent: 6060922 (2000-05-01), Chow et al.
patent: 6137438 (2000-10-01), McEwan
patent: 6201438 (2001-03-01), Nicollini et al.
patent: 6344773 (2002-02-01), Sevastopoulos et al.
“A Beginners Guide to Filter Topologies,” Application Note 1762, www.maxim-ic.com/appnotes.cfm/appnote—number/1762, Dallas Semiconductor Maxim (2005) (5 pages).
Cox Smith Matthews Incorporated
K-Tek Corporation
Le Dinh T.
LandOfFree
Input filter circuit for an operational amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Input filter circuit for an operational amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Input filter circuit for an operational amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3688846