JPS5593069A - Frequency decision circuit - Google Patents

Frequency decision circuit

Info

Publication number
JPS5593069A
JPS5593069A JP16532578A JP16532578A JPS5593069A JP S5593069 A JPS5593069 A JP S5593069A JP 16532578 A JP16532578 A JP 16532578A JP 16532578 A JP16532578 A JP 16532578A JP S5593069 A JPS5593069 A JP S5593069A
Authority
JP
Japan
Prior art keywords
frequency
circuit
selector circuit
output
correct
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.)
Granted
Application number
JP16532578A
Other languages
Japanese (ja)
Other versions
JPS5710386B2 (en
Inventor
Takehiko Hoshino
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.)
Nippon Signal Co Ltd
Original Assignee
Nippon Signal Co Ltd
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 Nippon Signal Co Ltd filed Critical Nippon Signal Co Ltd
Priority to JP16532578A priority Critical patent/JPS5593069A/en
Publication of JPS5593069A publication Critical patent/JPS5593069A/en
Publication of JPS5710386B2 publication Critical patent/JPS5710386B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

PURPOSE: To make it possible for a simply-constituted circuit to check whether the output logic of a frequency selector circuit is correct or not, by allowing an ATC/ ATS unit to generate a fixed frequency component corresponding to an input signal.
CONSTITUTION: A modulated signal on a track received by antenna 1 on a car roof is supplied to digital frequency selector circuit 7 and the frequency of local oscillator 8 is controlled by logic outputs QR, QY and QG obtained by logically judging an input frequency. Then, the input signal is modulated by modulator 9 by using an oscillation output to generate a component of previously-fixed frequency f0 and filter 10 extracts the frequency component of f0. Then, gate circuits 14R, 14Y and 14G are opened to output signals R, Y and G obtained by logical judging. Consequently, a simple circuit constitution provides a check on whether the output logic of the frequency selector circuit is correct or not.
COPYRIGHT: (C)1980,JPO&Japio
JP16532578A 1978-12-30 1978-12-30 Frequency decision circuit Granted JPS5593069A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16532578A JPS5593069A (en) 1978-12-30 1978-12-30 Frequency decision circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16532578A JPS5593069A (en) 1978-12-30 1978-12-30 Frequency decision circuit

Publications (2)

Publication Number Publication Date
JPS5593069A true JPS5593069A (en) 1980-07-15
JPS5710386B2 JPS5710386B2 (en) 1982-02-26

Family

ID=15810177

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16532578A Granted JPS5593069A (en) 1978-12-30 1978-12-30 Frequency decision circuit

Country Status (1)

Country Link
JP (1) JPS5593069A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59159601A (en) * 1983-02-28 1984-09-10 Hitachi Ltd automatic train control device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59159601A (en) * 1983-02-28 1984-09-10 Hitachi Ltd automatic train control device

Also Published As

Publication number Publication date
JPS5710386B2 (en) 1982-02-26

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