WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO1981001922) TONE CONTROL CIRCUIT
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/001922    International Application No.:    PCT/JP1980/000328
Publication Date: 09.07.1981 International Filing Date: 25.12.1980
IPC:
H03G 5/04 (2006.01), H03G 5/10 (2006.01)
Applicants:
Inventors:
Priority Data:
79/170791 29.12.1979 JP
Title (EN) TONE CONTROL CIRCUIT
(FR) CIRCUIT DE COMMANDE DE TONALITES
Abstract: front page image
(EN)Tone control device having a construction for operating on an input signal and on the signal obtained by passing the input signal through both a filter and a gain-controlled circuit, the gain of the gain-controlled circuit being varied by a control voltage for exercising tone control. One filter is used in common for establishing both bands of boosting and cutting to facilitate IC circuit manufacture. In order to prevent the cut-off frequency from deviating between the boosting- and the cutting-modes, the discrimination between the modes is made on the basis of the control voltage on the basis of which discrimination the characteristics and the gain of the filter are changed-over.
(FR)Un dispositif de commande de tonalites presente une construction fonctionnant sur un signal d"entree et sur le signal obtenu en faisant passer le signal d"entree par un filtre et un circuit a commande de gain, le gain du circuit a commande de gain variant a l"aide d"une tension de commande pour exercer la commande de tonalites. Un filtre est utilise en commun pour etablir les deux bandes d"elevation et de coupure pour faciliter la fabrication de circuits IC (circuits integres). De maniere a empecher la frequence de coupure de devier entre les modes d"elevation et de coupure, la discrimination entre les modes se fait sur la base de la tension de commande, discrimination d"apres laquelle les caracteristiques et le gain du filtre sont changes.
Designated States:
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)