Title (en)

CIRCUIT ARRANGEMENT FOR CORRECTING LINEAR AND NON-LINEAR TRANSFER CHARACTERISTICS OF ELECTROACUSTIC TRANSDUCERS

Publication

EP 0508392 A3 19931215 (DE)

Application

EP 92106049 A 19920407

Priority

DE 4111884 A 19910409

Abstract (en)

[origin: EP0508392A2] The invention relates to a circuit arrangement for correcting linear and non-linear transfer characteristics of electroacoustic transducers within the entire range of modulation (small- and large-signal behaviour), consisting of an electrical equaliser network which is coupled to the connecting terminals of the transducer and an aid, which is connected either temporarily or continuously, for matching the equaliser network to the transducer. The equaliser network (1) consists of a chain circuit of transmission elements, at least one transmission element (two-terminal network Z) exhibiting a non-linear transfer characteristic between its input and output port. The non-linear equaliser network contains linear transmission systems, multiplicative and additive logic elements and non-linear volatile two-terminal networks which are interconnected in accordance with the balanced active structure of the transducer. The parameters of the non-linear volatile two-terminal networks are variable by means of control signals (39, 40, 41). The matching aid activated only for matching purposes contains a main controller (89), a generating part (75) for generating an excitation signal and an analysis part (76) for converting the measurement signal, picked up via a sensor (3), into control signals (39, 40, 41) for automatically setting the parameters of the equaliser network. The equaliser network matched to the transducer (2) by means of this aid changes the linear transfer characteristics and reduces the non-linear distortions of the overall system. The invention is characterised most clearly by Figure 22. <IMAGE>

IPC 1-7

H04R 3/00; H04R 3/04

IPC 8 full level

H04R 3/00 (2006.01); H04R 3/04 (2006.01)

CPC (source: EP US)

H04R 3/002 (2013.01 - EP US); H04R 3/02 (2013.01 - EP US); H04R 3/08 (2013.01 - EP US)

Citation (search report)

• [A] EP 0168078 A1 19860115 - PHILIPS NV [NL]
• [A] EP 0145997 A2 19850626 - PFLEIDERER PETER M DIPL ING
• [A] EP 0094762 A2 19831123 - TELEDYNE IND [US]

Designated contracting state (EPC)

DE FR GB IT NL

DOCDB simple family (publication)

EP 0508392 A2 19921014; EP 0508392 A3 19931215; DE 4111884 A1 19921015; DE 4111884 C2 19930902; US 5438625 A 19950801

DOCDB simple family (application)

EP 92106049 A 19920407; DE 4111884 A 19910409; US 86731492 A 19920409