GB1259795A - Improvements in or relating to signal converter circuits for keying and modulating - Google Patents

Improvements in or relating to signal converter circuits for keying and modulating

Info

Publication number
GB1259795A
GB1259795A GB2246469A GB2246469A GB1259795A GB 1259795 A GB1259795 A GB 1259795A GB 2246469 A GB2246469 A GB 2246469A GB 2246469 A GB2246469 A GB 2246469A GB 1259795 A GB1259795 A GB 1259795A
Authority
GB
United Kingdom
Prior art keywords
transistor
emitter
base
tuned circuit
coupled
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.)
Expired
Application number
GB2246469A
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.)
Siemens AG
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 GB1259795A publication Critical patent/GB1259795A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/80—Generating trains of sinusoidal oscillations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/14—Arrangements providing for calling or supervisory signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/04—Modulator circuits; Transmitter circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/12—Modulator circuits; Transmitter circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Amplitude Modulation (AREA)

Abstract

1,259,795. Amplitude modulation systems; transistor oscillator circuits. SIEMENS A.G. 2 May, 1969 [3 May, 1698], No. 22464/69. Headings H3R and H3T. An oscillator is keyed by a data signal by interruption of the feedback path. Tuned circuit L, C is coupled by means of a two-stage emitter-follower comprising transistors T1, T2 to the base of transistor T3. Transistors T3, T4 form an emitter-coupled pair having the collector to emitter path of transistor T5 as common emitter impedance, and their collectors are back-coupled to the tuned circuit inductor L via centre-tapped coupling coil W1. Oscillations can be interrupted by means of a switch S, which may comprise a further transistor driven by data signals and which connects the base of transistor T3 to a point of constant potential. The band-width of the signals is determined by the tuned circuit L, C and may be adjusted by means of a shunt resistor RL. The arrangement may be used to provide amplitude modulated signals, the modulating signal being applied to the base of transistor T5.
GB2246469A 1968-05-03 1969-05-02 Improvements in or relating to signal converter circuits for keying and modulating Expired GB1259795A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681762235 DE1300584B (en) 1968-05-03 1968-05-03 Circuit arrangement for generating a carrier oscillation which is sampled by a data signal

Publications (1)

Publication Number Publication Date
GB1259795A true GB1259795A (en) 1972-01-12

Family

ID=5696935

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2246469A Expired GB1259795A (en) 1968-05-03 1969-05-02 Improvements in or relating to signal converter circuits for keying and modulating

Country Status (9)

Country Link
AT (1) AT306796B (en)
BE (1) BE734556A (en)
CH (1) CH489158A (en)
DE (1) DE1300584B (en)
FR (1) FR2050771A5 (en)
GB (1) GB1259795A (en)
LU (1) LU58766A1 (en)
NL (1) NL161948C (en)
SE (1) SE345776B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2138563A (en) * 1983-04-21 1984-10-24 American Telephone & Telegraph Improvements in or relating to acoustic ranging apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2138563A (en) * 1983-04-21 1984-10-24 American Telephone & Telegraph Improvements in or relating to acoustic ranging apparatus

Also Published As

Publication number Publication date
FR2050771A5 (en) 1971-04-02
NL161948B (en) 1979-10-15
BE734556A (en) 1969-12-15
NL6906291A (en) 1969-11-05
NL161948C (en) 1980-03-17
SE345776B (en) 1972-06-05
LU58766A1 (en) 1969-10-28
AT306796B (en) 1973-04-25
DE1300584B (en) 1969-08-07
CH489158A (en) 1970-04-15

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee