JPS5510251A - Am stereophonic demodulator circuit - Google Patents

Am stereophonic demodulator circuit

Info

Publication number
JPS5510251A
JPS5510251A JP8298678A JP8298678A JPS5510251A JP S5510251 A JPS5510251 A JP S5510251A JP 8298678 A JP8298678 A JP 8298678A JP 8298678 A JP8298678 A JP 8298678A JP S5510251 A JPS5510251 A JP S5510251A
Authority
JP
Japan
Prior art keywords
circuit
stereophonic
output
lpf46
moat
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
JP8298678A
Other languages
Japanese (ja)
Other versions
JPS6130783B2 (en
Inventor
Isao Akitake
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8298678A priority Critical patent/JPS5510251A/en
Publication of JPS5510251A publication Critical patent/JPS5510251A/en
Publication of JPS6130783B2 publication Critical patent/JPS6130783B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/86—Arrangements characterised by the broadcast information itself
    • H04H20/88—Stereophonic broadcast systems

Abstract

PURPOSE:To make it possible to display stereophonic and monaural operations and also to perform operation corresponding to the lowering of a S/N ratio in a weak electric field, by providing an AM stereophonic demodulator circuit on the moat roller system with a simple stereophonic-monaural switching function. CONSTITUTION:The demodulator circuit on the moat roller system which transmits a steriophonic signal by pi/2-out-of-phase signals lagging and leading a reference signal by phase differences of pi/4 is provided with PLL circuit 32 which generates the reference signal for demodulation. This circuit 32 detects the mean level of output and input signals of LPF46 and the detection signal is applied to adder circuits 48 and 49 via change-over switch circuit 50. This circuit 50 is closed by the output of AND circuit 51 to which the outputs of LPF46, rectifier circuit 44 and change-over switch 52 are supplied to put the system in the stereophonic mode; and its output is displayed by stereo indication lamp 57 and even if the S/N lowers, operation is carried out corresponding to it.
JP8298678A 1978-07-10 1978-07-10 Am stereophonic demodulator circuit Granted JPS5510251A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8298678A JPS5510251A (en) 1978-07-10 1978-07-10 Am stereophonic demodulator circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8298678A JPS5510251A (en) 1978-07-10 1978-07-10 Am stereophonic demodulator circuit

Publications (2)

Publication Number Publication Date
JPS5510251A true JPS5510251A (en) 1980-01-24
JPS6130783B2 JPS6130783B2 (en) 1986-07-16

Family

ID=13789530

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8298678A Granted JPS5510251A (en) 1978-07-10 1978-07-10 Am stereophonic demodulator circuit

Country Status (1)

Country Link
JP (1) JPS5510251A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56168451A (en) * 1980-05-28 1981-12-24 Sanyo Electric Co Ltd Receiver of am stereophonic broadcast
JPS579143A (en) * 1980-06-18 1982-01-18 Sanyo Electric Co Ltd Am stereo receiver
JPS5793742A (en) * 1980-12-03 1982-06-10 Hitachi Ltd Am stereo receiver
JPH0555645U (en) * 1991-12-25 1993-07-23 株式会社ケンウッド AM stereo broadcast receiver

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5744467A (en) * 1980-08-28 1982-03-12 Nippon Steel Corp Plasma cutter
JPH0420592Y2 (en) * 1988-01-30 1992-05-12

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56168451A (en) * 1980-05-28 1981-12-24 Sanyo Electric Co Ltd Receiver of am stereophonic broadcast
JPS6312414B2 (en) * 1980-05-28 1988-03-18 Sanyo Electric Co
JPS579143A (en) * 1980-06-18 1982-01-18 Sanyo Electric Co Ltd Am stereo receiver
JPS636181B2 (en) * 1980-06-18 1988-02-08 Sanyo Electric Co
JPS5793742A (en) * 1980-12-03 1982-06-10 Hitachi Ltd Am stereo receiver
JPS637695B2 (en) * 1980-12-03 1988-02-18 Hitachi Ltd
JPH0555645U (en) * 1991-12-25 1993-07-23 株式会社ケンウッド AM stereo broadcast receiver

Also Published As

Publication number Publication date
JPS6130783B2 (en) 1986-07-16

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