EP 1190457 A1 20020327 - PIEZO-ELECTRIC TRANSFORMER CIRCUIT
Title (en)
PIEZO-ELECTRIC TRANSFORMER CIRCUIT
Title (de)
PIEZOELEKTRISCHE TRANSFORMATOR-SCHALTUNG
Title (fr)
CIRCUIT TRANSFORMATEUR PIEZO-ELECTRIQUE
Publication
Application
Priority
- GB 0002418 W 20000622
- GB 9914516 A 19990623
Abstract (en)
[origin: GB2351389A] The invention relates to a piezo-electric transformer circuit (200) incorporating a piezo-electric transformer (10) comprising a multi-element primary region (12) and a single element secondary region (14) mutually joined together. In operation, the circuit (200) applies a drive signal to the primary region (12) to excite the primary and secondary regions (12, 14) into longitudinal resonance, thereby generating a high potential signal at the secondary region (14). The drive signal is derived from the signal at the secondary region (14) in a self oscillating feedback loop configuration. The configuration provides the advantage that the transformer (10) is driven more accurately at its resonant frequency, thereby improving efficiency of the circuit (200) when the secondary region (14) is electrically loaded.
IPC 1-7
IPC 8 full level
B06B 1/06 (2006.01); H01L 41/04 (2006.01); H01L 41/107 (2006.01); H02N 2/00 (2006.01)
CPC (source: EP KR)
H02M 7/537 (2013.01 - KR); H10N 30/40 (2023.02 - EP); H10N 30/804 (2023.02 - EP)
Citation (search report)
See references of WO 0101500A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
GB 2351389 A 20001227; GB 9914516 D0 19990825; AU 5550600 A 20010131; CA 2377777 A1 20010104; EP 1190457 A1 20020327; JP 2003503185 A 20030128; KR 20020023963 A 20020329; WO 0101500 A1 20010104
DOCDB simple family (application)
GB 9914516 A 19990623; AU 5550600 A 20000622; CA 2377777 A 20000622; EP 00940592 A 20000622; GB 0002418 W 20000622; JP 2001506626 A 20000622; KR 20017016501 A 20011222