Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Patent
1996-08-20
1998-08-11
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
327321, 327327, 327332, 327538, 331111, 331143, H03K 508
Patent
active
057932417
ABSTRACT:
An op amp clamp for charging or discharging a capacitor prevents the voltage on the capacitor from going beyond a reference voltage determined by a reference clamp voltage applied to an input of a differential amplifier. The second input of the differential amplifier is connected to the capacitor. The output of the differential amplifier is provided in a feedback loop to the capacitor. The feedback loop includes a charging circuit or a discharging circuit depending upon the function of the op amp clamp. The feedback loop may be arranged with a current mirror in which current generated by the output of the differential amplifier is mirrored in the charging or discharging circuit. A signal to activate charging or discharging is applied at the output of the differential amplifier to activate or deactivate the current mirror.
REFERENCES:
patent: 3778581 (1973-12-01), Denny
patent: 4030015 (1977-06-01), Herko et al.
patent: 4247751 (1981-01-01), Ashton et al.
patent: 4276548 (1981-06-01), Lutz
patent: 4333490 (1982-06-01), Enter, Sr.
patent: 4538101 (1985-08-01), Shimpo et al.
patent: 4651678 (1987-03-01), Kime
patent: 4672332 (1987-06-01), Coccetti et al.
patent: 4733104 (1988-03-01), Steigerwald et al.
patent: 5079453 (1992-01-01), Tisinger et al.
patent: 5142217 (1992-08-01), Gontowski, Jr.
patent: 5311150 (1994-05-01), Engbretson et al.
patent: 5367247 (1994-11-01), Blocher et al.
patent: 5371552 (1994-12-01), Brummette et al.
patent: 5373217 (1994-12-01), Gregor
patent: 5425017 (1995-06-01), Copley et al.
patent: 5436583 (1995-07-01), Fujii et al.
patent: 5444359 (1995-08-01), Riggio
patent: 5444695 (1995-08-01), Copley et al.
patent: 5508664 (1996-04-01), Rizzo
patent: 5592128 (1997-01-01), Hwang
patent: 5627460 (1997-05-01), Bazinet et al.
patent: 5642027 (1997-06-01), Windes et al.
"Designing with a New Secondary Side Post Regulator (SSPR) PWM Controller for Multiple Output Power Supplies", Gedaly Levin, PCIM '95, Nurenberg, Germany, Jun. 20-22, 1995.
CS5101 Product Objective Specification dated Jun. 28, 1994 (Mar. 1994 APEC Conference).
"A New Secondary Side Post Regulator (SSPR) PWM Controller for Multiple Output Power Supplies", Gedaly Levin, APEC Conference, Mar. 5-9, 1995.
SSPR Block Diagram, Cherry Semiconductor Corporation, APEC Conference Mar. 5-9, 1995.
Patch Richard
Sanzo Christopher
Callahan Timothy P.
Cherry Semiconductor Corporation
Englund Terry L.
LandOfFree
High speed active op-amp clamp does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High speed active op-amp clamp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High speed active op-amp clamp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-392730