IT1213174B - Monolithic metering signal generator for telephone - Google Patents

Monolithic metering signal generator for telephone

Info

Publication number
IT1213174B
IT1213174B IT8421270A IT2127084A IT1213174B IT 1213174 B IT1213174 B IT 1213174B IT 8421270 A IT8421270 A IT 8421270A IT 2127084 A IT2127084 A IT 2127084A IT 1213174 B IT1213174 B IT 1213174B
Authority
IT
Italy
Prior art keywords
signal
voltage generator
circuit
monolithic
telephone
Prior art date
Application number
IT8421270A
Other languages
Italian (it)
Other versions
IT8421270A0 (en
Inventor
Marco Siligoni
Ferdinando Lari
Vanni Saviotti
Vittorio Comino
Original Assignee
Ates Componenti Elettron
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 Ates Componenti Elettron filed Critical Ates Componenti Elettron
Priority to IT8421270A priority Critical patent/IT1213174B/en
Publication of IT8421270A0 publication Critical patent/IT8421270A0/en
Priority to ES542548A priority patent/ES8700528A1/en
Priority to SE8502130A priority patent/SE456630B/en
Priority to FR8506722A priority patent/FR2563957B1/en
Priority to BR8502116A priority patent/BR8502116A/en
Priority to DE3516007A priority patent/DE3516007C2/en
Priority to US06/731,167 priority patent/US4638122A/en
Priority to GB08511492A priority patent/GB2161045B/en
Application granted granted Critical
Publication of IT1213174B publication Critical patent/IT1213174B/en

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Abstract

The monolithic integrated telephone circuit forms part of the exchange equipment and has a call charge signal regulator. The signal is formed by an a.c. voltage generator (TTX), of constant amplitude and frequency, typically 12 to 16 kHz, and a unidirectional voltage generator (IG) with a trapezoidal wave form. The signal is produced by multiplying (X) the outputs of the two generators. The signal is added (S) to the speech circuit (VC) and sent out on the transmission line. At a point (N) in the circuit (VC) the signal is extracted by a high pass filter (F) to eliminate speech, and then rectified (/v/). The rectified voltage is compared (COMP) with a set reference (VREF) and applied to a control circuit (LC) to regulate the trapezoidal voltage generator (FG). This regulation ensures a constant and adequate charge signal amplitude on the line.
IT8421270A 1984-05-04 1984-06-06 Monolithic metering signal generator for telephone IT1213174B (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
IT8421270A IT1213174B (en) 1984-06-06 1984-06-06 Monolithic metering signal generator for telephone
ES542548A ES8700528A1 (en) 1984-05-04 1985-04-25 Monolithically integratable telephone circuit for generating control signals for displaying telephone charges
SE8502130A SE456630B (en) 1984-05-04 1985-05-02 TELEPHONIC RIGHTS WHICH CAN BE INTEGRATED MONOLITICALLY AND WHICH CREATES CONTROL SIGNALS TO SUBSCRIPTION PRESENTATION UNIT
FR8506722A FR2563957B1 (en) 1984-05-04 1985-05-03 TELEPHONE CIRCUIT, INTEGRABLE MONOLITHICALLY, GENERATOR OF CONTROL SIGNALS FOR INDICATORS OF TAXATION OF SUBSCRIBERS
BR8502116A BR8502116A (en) 1984-05-04 1985-05-03 MONOLITICALLY INTEGRABLE TELEPHONE CIRCUIT TO GENERATE CONTROL SIGNS FOR USER BILLING INDICATORS
DE3516007A DE3516007C2 (en) 1984-05-04 1985-05-03 Monolithically integrable telephone circuit with control signal generator for charge indicators
US06/731,167 US4638122A (en) 1984-05-04 1985-05-06 Monolithically integratable telephone circuit for generating control signals for displaying telephone charges
GB08511492A GB2161045B (en) 1984-05-04 1985-05-07 Improvements in or relating to charging signal producing circuits for telephone exchanges

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT8421270A IT1213174B (en) 1984-06-06 1984-06-06 Monolithic metering signal generator for telephone

Publications (2)

Publication Number Publication Date
IT8421270A0 IT8421270A0 (en) 1984-06-06
IT1213174B true IT1213174B (en) 1989-12-14

Family

ID=11179314

Family Applications (1)

Application Number Title Priority Date Filing Date
IT8421270A IT1213174B (en) 1984-05-04 1984-06-06 Monolithic metering signal generator for telephone

Country Status (1)

Country Link
IT (1) IT1213174B (en)

Also Published As

Publication number Publication date
IT8421270A0 (en) 1984-06-06

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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: 19970628