Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Generating sawtooth or triangular output
Patent
1996-06-19
1998-02-03
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Generating sawtooth or triangular output
327131, 327231, 327237, H03K 490, H03K 406, H03K 5153
Patent
active
057148970
ABSTRACT:
A signal generator generates a reference signal, centered about a reference voltage and having a predetermined period. The signal generator also generates output signals P and Z. The output signal P is a squarewave which changes levels at the peaks of the reference signal. The output signal Z is a squarewave which changes levels at the reference voltage crossings of the reference signal. A phase-shifted signal generator generates a phase-shifted signal using the output signals P and Z by switching in appropriate signal levels from the signal generator. The output signals P and Z are input to a switch control circuit which controls a network of switches, depending on a current region of the reference signal, to couple appropriate signals to an amplifier circuit. The switch control circuit determines the current region based on the state of the output signals P and Z. The amplifier circuit provides the phase-shifted signal in response to the signals coupled to it by the network of switches. In an alternate embodiment, the output signal Z is generated by a hysteretic comparator and changes levels at positive and negative threshold levels above and below the reference voltage. The values of the positive and negative threshold values are variable and determine the degree of phase shift between the phase-shifted signal and the reference signal.
REFERENCES:
patent: 3649845 (1972-03-01), Foch
patent: 4008421 (1977-02-01), Bird
patent: 4101821 (1978-07-01), Kirby
patent: 4223261 (1980-09-01), White
patent: 4482961 (1984-11-01), Kilner et al.
patent: 4618787 (1986-10-01), Jacksier et al.
patent: 4680526 (1987-07-01), Okuyama et al.
patent: 4806880 (1989-02-01), Laws
patent: 4825132 (1989-04-01), Gritter
patent: 4841251 (1989-06-01), Hartmann et al.
patent: 4866397 (1989-09-01), Kimyacioglu
patent: 4928043 (1990-05-01), Plunkett
patent: 4949364 (1990-08-01), Yukawa
patent: 4962339 (1990-10-01), Schauder
patent: 4962344 (1990-10-01), Bohrer
patent: 5032771 (1991-07-01), Kerkman et al.
patent: 5066899 (1991-11-01), Nashiki
patent: 5111085 (1992-05-01), Stewart
patent: 5111150 (1992-05-01), Casey
patent: 5132599 (1992-07-01), Kono et al.
patent: 5172036 (1992-12-01), Cameron
patent: 5206543 (1993-04-01), Takita et al.
patent: 5218283 (1993-06-01), Wills et al.
patent: 5231339 (1993-07-01), Kishimoto et al.
patent: 5247237 (1993-09-01), Koyama et al.
patent: 5252905 (1993-10-01), Wills et al.
patent: 5278486 (1994-01-01), Kim
patent: 5304911 (1994-04-01), Anderson
patent: 5334923 (1994-08-01), Lorenz et al.
patent: 5345160 (1994-09-01), Corniere
patent: 5376866 (1994-12-01), Erdman
patent: 5410188 (1995-04-01), Segaram
patent: 5428285 (1995-06-01), Koyama et al.
patent: 5451832 (1995-09-01), Cameron et al.
Gottlieb, I. M., Electric Motors & Control Techniques, 2nd Ed., pp. 147-149, 235-247, TAB Books, 1994.
"ML4421--Variable Speed AC Induction Motor Controller", Micro Linear Corporation, Oct. 1995.
Culmer Daniel D.
Vitunic Mark R.
Callahan Timothy P.
Englund Terry L.
Micro Linear Corporation
LandOfFree
Phase-shifted triangle wave generator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Phase-shifted triangle wave generator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase-shifted triangle wave generator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-666179