IT8421010A0 - Generatore di segnali di chiamata telefonica. - Google Patents

Generatore di segnali di chiamata telefonica.

Info

Publication number
IT8421010A0
IT8421010A0 IT8421010A IT2101084A IT8421010A0 IT 8421010 A0 IT8421010 A0 IT 8421010A0 IT 8421010 A IT8421010 A IT 8421010A IT 2101084 A IT2101084 A IT 2101084A IT 8421010 A0 IT8421010 A0 IT 8421010A0
Authority
IT
Italy
Prior art keywords
signal generator
telephone call
call signal
telephone
generator
Prior art date
Application number
IT8421010A
Other languages
English (en)
Other versions
IT8421010A1 (it
IT1176152B (it
Inventor
Richard Joseph Lisco
Original Assignee
American Telephone & Telegraph
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 American Telephone & Telegraph filed Critical American Telephone & Telegraph
Publication of IT8421010A0 publication Critical patent/IT8421010A0/it
Publication of IT8421010A1 publication Critical patent/IT8421010A1/it
Application granted granted Critical
Publication of IT1176152B publication Critical patent/IT1176152B/it

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/066—Generating pulses having essentially a finite slope or stepped portions having triangular shape using a Miller-integrator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B28/00—Generation of oscillations by methods not covered by groups H03B5/00 - H03B27/00, including modification of the waveform to produce sinusoidal oscillations
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/217—Class D power amplifiers; Switching amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/66—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will
    • H03K17/661—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to both load terminals
    • H03K17/662—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to both load terminals each output circuit comprising more than one controlled bipolar transistor
    • H03K17/663—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to both load terminals each output circuit comprising more than one controlled bipolar transistor using complementary bipolar transistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/01—Shaping pulses
    • H03K5/08—Shaping pulses by limiting; by thresholding; by slicing, i.e. combined limiting and thresholding
    • H03K5/082—Shaping pulses by limiting; by thresholding; by slicing, i.e. combined limiting and thresholding with an adaptive threshold
    • H03K5/086—Shaping pulses by limiting; by thresholding; by slicing, i.e. combined limiting and thresholding with an adaptive threshold generated by feedback
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/023—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone by reversing the polarity of the current at the exchange
IT21010/84A 1983-05-20 1984-05-18 Generatore di segnali di chiamata telefonica IT1176152B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/496,559 US4500844A (en) 1983-05-20 1983-05-20 Ringing signal generator employing delta-modulation power amplification techniques

Publications (3)

Publication Number Publication Date
IT8421010A0 true IT8421010A0 (it) 1984-05-18
IT8421010A1 IT8421010A1 (it) 1985-11-18
IT1176152B IT1176152B (it) 1987-08-18

Family

ID=23973164

Family Applications (1)

Application Number Title Priority Date Filing Date
IT21010/84A IT1176152B (it) 1983-05-20 1984-05-18 Generatore di segnali di chiamata telefonica

Country Status (7)

Country Link
US (1) US4500844A (it)
EP (1) EP0144344B1 (it)
JP (1) JPH0754885B2 (it)
CA (1) CA1202741A (it)
DE (1) DE3484007D1 (it)
IT (1) IT1176152B (it)
WO (1) WO1984004857A1 (it)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1234939A (en) * 1985-10-28 1988-04-05 Brian J. Pollard Power amplifier
US5001748A (en) * 1989-08-21 1991-03-19 Siemens Transmission Systems, Inc. Ringing signal generator
FR2660182A1 (fr) * 1990-03-27 1991-10-04 Ciposa Microtech Papillometre.
US5077540A (en) * 1990-06-14 1991-12-31 University Of Virginia Patents Foundation Minimum pulse width switching power amplifier
US5233649A (en) * 1990-08-30 1993-08-03 Guerra Jr Roy H Telephone ringing module
WO1993011624A1 (en) * 1991-12-02 1993-06-10 Harris Corporation Telephone ringing signal generator
US5307407A (en) * 1991-12-19 1994-04-26 Nec America, Inc. 20 Hz ring generator using high frequency PWM control
US5838788A (en) * 1996-10-17 1998-11-17 Northern Telecom Limited Telephone ringing signal generator
US6097249A (en) 1998-09-02 2000-08-01 Rockford Corporation Method and device for improved class BD amplification having single-terminal alternating-rail dual-sampling topology
US6259317B1 (en) * 1999-09-22 2001-07-10 Audio Logic, Inc. Output stage utilizing a floating power supply
GB2358989B (en) * 2000-02-03 2004-01-21 Lake Electronic Tech A circuit for developing an ac ringing voltage from a dc voltage supply
US20040120507A1 (en) * 2002-12-18 2004-06-24 Nasser Pooladian Ring signal voltage offset for subscriber line interface circuit
US7822097B2 (en) * 2004-08-20 2010-10-26 Imec Devices and methods for ultra-wideband communications
US8379839B2 (en) * 2009-08-07 2013-02-19 Microsemi Semiconductor (U.S.) Inc. Method and apparatus for controlling ringing voltage
US10277229B2 (en) * 2014-04-25 2019-04-30 Kohler Co. Communication over generator bus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL155997B (nl) * 1972-06-24 1978-02-15 Philips Nv Overdrachtsstelsel.
FR2302629A1 (fr) * 1975-02-28 1976-09-24 Lannionnais Electronique Procede de codage d'un signal et dispositif de transmission mettant en oeuvre le procede
FR2383568A1 (fr) * 1977-03-08 1978-10-06 Trt Telecom Radio Electr Dispositif destine a engendrer un signal d'appel et utilisable notamment dans un joncteur d'abonne
CA1114536A (en) * 1978-12-11 1981-12-15 William B. Kiss Ringing generator
US4239935A (en) * 1979-04-27 1980-12-16 Bell Telephone Laboratories, Incorporated Ringing generator
US4349703A (en) * 1980-03-31 1982-09-14 International Telephone And Telegraph Corporation Programmable ring signal generator
US4340785A (en) * 1981-01-26 1982-07-20 Northern Telecom Limited Ringing signal supply

Also Published As

Publication number Publication date
IT8421010A1 (it) 1985-11-18
EP0144344A1 (en) 1985-06-19
CA1202741A (en) 1986-04-01
IT1176152B (it) 1987-08-18
EP0144344A4 (en) 1988-02-15
JPS60501287A (ja) 1985-08-08
DE3484007D1 (de) 1991-02-28
WO1984004857A1 (en) 1984-12-06
EP0144344B1 (en) 1991-01-23
JPH0754885B2 (ja) 1995-06-07
US4500844A (en) 1985-02-19

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19970526