PT89594A - Sistema de circuitos com componentes activos ou passivos regulaveis - Google Patents

Sistema de circuitos com componentes activos ou passivos regulaveis

Info

Publication number
PT89594A
PT89594A PT89594A PT8959489A PT89594A PT 89594 A PT89594 A PT 89594A PT 89594 A PT89594 A PT 89594A PT 8959489 A PT8959489 A PT 8959489A PT 89594 A PT89594 A PT 89594A
Authority
PT
Portugal
Prior art keywords
telephone
adjustable
central store
intermediate stores
volatile
Prior art date
Application number
PT89594A
Other languages
English (en)
Other versions
PT89594B (pt
Inventor
Karl Formanek
Original Assignee
Siemens Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Ag filed Critical Siemens Ag
Publication of PT89594A publication Critical patent/PT89594A/pt
Publication of PT89594B publication Critical patent/PT89594B/pt

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H03G3/3026—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being discontinuously variable, e.g. controlled by switching
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/001—Digital control of analog signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6025—Substation equipment, e.g. for use by subscribers including speech amplifiers implemented as integrated speech networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
    • H04R25/603—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of mechanical or electronic switches or control elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
    • H04R25/609—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of circuitry

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Networks Using Active Elements (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Filters And Equalizers (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Semiconductor Lasers (AREA)
  • Devices For Supply Of Signal Current (AREA)
PT89594A 1988-02-02 1989-02-02 Sistema de circuitos com componentes activos ou passivos regulaveis PT89594B (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT207/88A AT392556B (de) 1988-02-02 1988-02-02 Schaltungsanordnung mit stellbaren verstaerkern und bzw. oder stellbaren widerstaenden

Publications (2)

Publication Number Publication Date
PT89594A true PT89594A (pt) 1989-10-04
PT89594B PT89594B (pt) 1994-01-31

Family

ID=3484329

Family Applications (1)

Application Number Title Priority Date Filing Date
PT89594A PT89594B (pt) 1988-02-02 1989-02-02 Sistema de circuitos com componentes activos ou passivos regulaveis

Country Status (10)

Country Link
EP (2) EP0380819A1 (pt)
JP (1) JPH03502993A (pt)
AT (2) AT392556B (pt)
CA (1) CA1298924C (pt)
DK (1) DK178990A (pt)
ES (1) ES2027071T3 (pt)
GR (1) GR3003524T3 (pt)
PT (1) PT89594B (pt)
WO (1) WO1989007366A1 (pt)
ZA (1) ZA89816B (pt)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4124585A1 (de) * 1991-07-24 1993-01-28 Siemens Ag Steuerbare schaltungsanordnung
US5634592A (en) * 1994-04-07 1997-06-03 Flow-Rite Controls, Ltd. Flow control apparatus and method for making same
CN1759633B (zh) * 2003-03-11 2010-12-08 美商楼氏电子有限公司 带有可变缓冲电路的换能器及其调节方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2448193B1 (fr) * 1979-02-01 1985-12-06 Michel Andre Attenuateur electronique multivoies a reglages memorises et a visualisation par diodes electroluminescentes
GB8322440D0 (en) * 1983-08-19 1983-09-21 Gen Electric Co Plc Frequency division multiplex transmission equipment
AT379929B (de) * 1984-07-18 1986-03-10 Viennatone Gmbh Hoergeraet
DE3642828C3 (de) * 1986-02-03 1995-05-04 Toepholm & Westermann Fernsteuerbares Hörgerät

Also Published As

Publication number Publication date
ZA89816B (en) 1990-06-27
WO1989007366A1 (fr) 1989-08-10
EP0389569B1 (de) 1991-10-23
EP0380819A1 (de) 1990-08-08
PT89594B (pt) 1994-01-31
JPH03502993A (ja) 1991-07-04
CA1298924C (en) 1992-04-14
ATA20788A (de) 1990-09-15
DK178990D0 (da) 1990-07-27
ES2027071T3 (es) 1992-05-16
AT392556B (de) 1991-04-25
ATE68923T1 (de) 1991-11-15
DK178990A (da) 1990-07-27
EP0389569A1 (de) 1990-10-03
GR3003524T3 (pt) 1993-03-16

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Legal Events

Date Code Title Description
FG3A Patent granted, date of granting

Effective date: 19930706

PC3A Transfer or assignment

Free format text: 931006 SIEMENS AKTIENGESELLSCHAFT OSTERREICH AT