CA2291884A1 - Click-free muting circuit for headset - Google Patents

Click-free muting circuit for headset Download PDF

Info

Publication number
CA2291884A1
CA2291884A1 CA 2291884 CA2291884A CA2291884A1 CA 2291884 A1 CA2291884 A1 CA 2291884A1 CA 2291884 CA2291884 CA 2291884 CA 2291884 A CA2291884 A CA 2291884A CA 2291884 A1 CA2291884 A1 CA 2291884A1
Authority
CA
Canada
Prior art keywords
click
microphone
headset
muting circuit
circuit
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA 2291884
Other languages
French (fr)
Other versions
CA2291884C (en
Inventor
Nikola Gligoric
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitel Networks Corp
Original Assignee
Mitel Corp
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 Mitel Corp filed Critical Mitel Corp
Publication of CA2291884A1 publication Critical patent/CA2291884A1/en
Application granted granted Critical
Publication of CA2291884C publication Critical patent/CA2291884C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/16—Modifications for eliminating interference voltages or currents
    • 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
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets

Abstract

A click-muting circuit for a headset microphone connected to a telephone, comprising a user operated mute switch, a click eliminator circuit connected across the microphone for gradually creating a short circuit across the microphone in response to closure of the mute switch, and a hard muting circuit connected in series with the microphone for disconnecting the microphone after the short circuit has been established.
CA 2291884 1998-12-11 1999-12-09 Click-free muting circuit for headset Expired - Lifetime CA2291884C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9827184.4 1998-12-11
GB9827184A GB2344711B (en) 1998-12-11 1998-12-11 Click-free muting circuit for headset

Publications (2)

Publication Number Publication Date
CA2291884A1 true CA2291884A1 (en) 2000-06-11
CA2291884C CA2291884C (en) 2006-01-31

Family

ID=10843975

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2291884 Expired - Lifetime CA2291884C (en) 1998-12-11 1999-12-09 Click-free muting circuit for headset

Country Status (2)

Country Link
CA (1) CA2291884C (en)
GB (1) GB2344711B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2350256B (en) * 1999-05-17 2001-05-30 Mitel Corp Click free mute switch circuit for telephones
JP7212935B2 (en) 2019-03-01 2023-01-26 株式会社オーディオテクニカ headset
JP7305162B2 (en) * 2019-06-19 2023-07-10 株式会社オーディオテクニカ sound-electricity converter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB592917A (en) * 1945-06-08 1947-10-02 Standard Telephones Cables Ltd Improvements in or relating to volume control and mixing arrangements in broadcasting systems and the like
DE3108407A1 (en) * 1981-03-06 1982-09-16 Robert Bosch Gmbh, 7000 Stuttgart "SOUND AUDIO"
US4675905A (en) * 1985-04-12 1987-06-23 Ampex Corporation Multiple input silent audio switch
US5353347A (en) * 1992-02-04 1994-10-04 Acs Communications, Inc. Telephone headset amplifier with battery saver, receive line noise reduction, and click-free mute switching
US5832075A (en) * 1996-09-20 1998-11-03 Mitel Corporation Off-hook detector for headset
GB2342798B (en) * 1998-10-16 2003-04-16 Mitel Corp Telephone headset click-free muting circuit

Also Published As

Publication number Publication date
GB2344711B (en) 2004-02-25
GB9827184D0 (en) 1999-02-03
CA2291884C (en) 2006-01-31
GB2344711A (en) 2000-06-14

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20191209