Electricity: power supply or regulation systems – Including a transformer or an inductor
Patent
1998-04-03
2000-01-18
Wong, Peter S.
Electricity: power supply or regulation systems
Including a transformer or an inductor
310316, 310318, H01F 1700, H01L 4108
Patent
active
060160527
ABSTRACT:
A pulse frequency modulation drive circuit (1114) for a piezoelectric transformer (1102) is provided. Circuit (1114) includes a piezoelectric transformer (1102) having a resonant frequency and an input and an output section. A frequency feedback network connected to the piezoelectric transformer (1102) and an output level sense (1112) connected to the piezoelectric transformer (1102) is also provided. A drive circuit (1114) has a first switch (S.sub.1) and a third switch (S.sub.3) having a capacitance (1118) therebetween. A second switch (S.sub.2) and a fourth switch (S.sub.4) connect a supply voltage (V.sub.IN) to each of a pair of inductors (L.sub.1 and L.sub.2) and the second switch (S.sub.2) and the fourth switch (S.sub.4) are driven 180.degree. out of phase at the resonant frequency of the piezoelectric transformer (1102).
REFERENCES:
patent: 3919656 (1975-11-01), Sokal et al.
patent: 5208205 (1993-05-01), Mitsuyasu
patent: 5329200 (1994-07-01), Zaitsu
patent: 5341061 (1994-08-01), Zaitsu
patent: 5424935 (1995-06-01), Wu
patent: 5548189 (1996-08-01), Williams
patent: 5654605 (1997-08-01), Kawashima
patent: 5675484 (1997-10-01), Shimada
patent: 5705877 (1998-01-01), Shimada
patent: 5739621 (1998-04-01), Atsuta et al.
patent: 5760619 (1998-06-01), Yamaguchi
patent: 5777425 (1998-07-01), Ino et al.
patent: 5859489 (1999-01-01), Shimada
Third Order Logitudinal Mode Piezoelectric Ceramic Transformer and Its Application to High-Voltage Power Inverter. Kawashima et al. IEEE 1994 Ultrasonics Symposium. p. 525-530.
Operation Analysis of the Push-Pull Piezoelectric Inverter. Shoyama et al. IEEE 1997. p. 573-578.
CTS Corporation
Patel Rajnikani B.
Wong Peter S.
LandOfFree
Pulse frequency modulation drive circuit for piezoelectric trans does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pulse frequency modulation drive circuit for piezoelectric trans, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pulse frequency modulation drive circuit for piezoelectric trans will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-565363