JPS57212852A - Transmitter - Google Patents

Transmitter

Info

Publication number
JPS57212852A
JPS57212852A JP56099369A JP9936981A JPS57212852A JP S57212852 A JPS57212852 A JP S57212852A JP 56099369 A JP56099369 A JP 56099369A JP 9936981 A JP9936981 A JP 9936981A JP S57212852 A JPS57212852 A JP S57212852A
Authority
JP
Japan
Prior art keywords
power failure
failure information
battery
demodulator
modulator
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.)
Pending
Application number
JP56099369A
Other languages
Japanese (ja)
Inventor
Susumu Fujita
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP56099369A priority Critical patent/JPS57212852A/en
Publication of JPS57212852A publication Critical patent/JPS57212852A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/10—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being vacuum tube

Landscapes

  • Communication Control (AREA)

Abstract

PURPOSE:To decrease the capacity of a battery through the simplified circuit constitution, by transmitting a data and power failure information with a modulator and a demodulator in common use. CONSTITUTION:When a power supply 7 is failed, a battery 8 starts power supply to a transmitter 17. Thus, a switching device 19 changes over an input to the battery 8 and selects power failure information. This power failure information consists of marks (or spaces) and is modulated with a modulator 3 and transmitted to a transmitter 10. In a receiver 18, a demodulator 11 demodulates a reception signal and transmits it to a detector 15. When the detector 15 detects that the input has power failure information, the detector outputs the information as power failure information 16. In this state, an output device 12 blocks the output. That is, no data 13 is outputted. As a result, since transmission can be conducted with a modulator and a demodulator in common use by cleverly controlling the power failure information and data, the constitution of the circuit can be simplified and the capacity of the battery can be decreased.
JP56099369A 1981-06-24 1981-06-24 Transmitter Pending JPS57212852A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56099369A JPS57212852A (en) 1981-06-24 1981-06-24 Transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56099369A JPS57212852A (en) 1981-06-24 1981-06-24 Transmitter

Publications (1)

Publication Number Publication Date
JPS57212852A true JPS57212852A (en) 1982-12-27

Family

ID=14245625

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56099369A Pending JPS57212852A (en) 1981-06-24 1981-06-24 Transmitter

Country Status (1)

Country Link
JP (1) JPS57212852A (en)

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