Drive circuit

Details Drive circuit Drive circuit

2011-05-17

2011-05-17

Rosenau, Derek J (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S321000

Reexamination Certificate

active

07944116

ABSTRACT:
A drive circuit for a high-frequency agitation source includes a signal generator generating a train of low voltage square-wave pulses at a drive frequency, a booster including a boost inductor generating a back EMF and configured to produce a high-voltage pulse train in response to the low-voltage square-wave pulse train and a filter producing a drive signal having a pre-determined harmonic of the drive frequency, the drive signal being used to drive the high-frequency agitation source. The drive circuit is particularly suitable for use with piezoelectric crystals.

REFERENCES:
patent: 4642581 (1987-02-01), Erickson
patent: 2002/0117939 (2002-08-01), Kawamoto
patent: 2004/0099218 (2004-05-01), Yang et al.
patent: 2007/0242427 (2007-10-01), Yamamoto et al.
patent: 10353835 (2005-06-01), None
patent: 0767504 (1997-04-01), None
patent: WO-01/29957 (2001-04-01), None
patent: WO 2005/080793 (2005-09-01), None
GB Search Report directed towards counterpart application No. GB0600868.4; 1 page.
International Search Report directed towards counterpart application No. PCT/GB2006/004606; 3 pages.
International Preliminary Report on Patentability directed towards counterpart application No. PCT/GB2006/004606; 5 pages.

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