JPS54122912A - Electronic wrist watch - Google Patents

Electronic wrist watch

Info

Publication number
JPS54122912A
JPS54122912A JP3031978A JP3031978A JPS54122912A JP S54122912 A JPS54122912 A JP S54122912A JP 3031978 A JP3031978 A JP 3031978A JP 3031978 A JP3031978 A JP 3031978A JP S54122912 A JPS54122912 A JP S54122912A
Authority
JP
Japan
Prior art keywords
waves
output
frequency
fed
added
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
JP3031978A
Other languages
Japanese (ja)
Inventor
Shinichi Sueki
Kikuo Oguchi
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP3031978A priority Critical patent/JPS54122912A/en
Publication of JPS54122912A publication Critical patent/JPS54122912A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/30—Circuits for homodyne or synchrodyne receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

PURPOSE:To made smaller the size of watch, by making less the configuration of the reception circuit without using IF frequency stages, through the constitution that the received electromagnetic waves are detected by using almost the same frequency as that of those, in an electronic watch mounting a radio receiver. CONSTITUTION:In the electronic watch mounting the radio receiver, the received electromagnetic waves inputted from the antenna are fed to the detector 21, to which the output of the local oscillator 22 oscillating almost the same frequency as that of the waves is added, allowing to detect the waves. The output is fed to the low frequency amplifier 24 via the low pass filter 23 and the output of the amplifier 24 is taken as the reception signal output. Or, to each of the detectors 43, 44, the frequency of the local oscillator 41 oscillating almost the same frequency as that of the reception waves is fed. The signal delayed with the RF 90 deg. phase shifter 42 is added to the detector 43 and the respective detector output is added with the adder 49, allowing to reduce the interference by the side band through the suppression of one of the lower and upper side band included in AM waves.
JP3031978A 1978-03-16 1978-03-16 Electronic wrist watch Pending JPS54122912A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3031978A JPS54122912A (en) 1978-03-16 1978-03-16 Electronic wrist watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3031978A JPS54122912A (en) 1978-03-16 1978-03-16 Electronic wrist watch

Publications (1)

Publication Number Publication Date
JPS54122912A true JPS54122912A (en) 1979-09-22

Family

ID=12300468

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3031978A Pending JPS54122912A (en) 1978-03-16 1978-03-16 Electronic wrist watch

Country Status (1)

Country Link
JP (1) JPS54122912A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020107302A (en) * 2018-12-27 2020-07-09 株式会社明電舎 Facility diagnostic device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020107302A (en) * 2018-12-27 2020-07-09 株式会社明電舎 Facility diagnostic device

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