JPS55118217A - Digital tuner - Google Patents

Digital tuner

Info

Publication number
JPS55118217A
JPS55118217A JP2600379A JP2600379A JPS55118217A JP S55118217 A JPS55118217 A JP S55118217A JP 2600379 A JP2600379 A JP 2600379A JP 2600379 A JP2600379 A JP 2600379A JP S55118217 A JPS55118217 A JP S55118217A
Authority
JP
Japan
Prior art keywords
waves
medium
counter
window comparator
tuning
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
JP2600379A
Other languages
Japanese (ja)
Other versions
JPS5920287B2 (en
Inventor
Hiroshi Tanaka
Motoyuki Ujiie
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.)
Tokyo Sanyo Electric Co Ltd
Sanyo Electric Co Ltd
Original Assignee
Tokyo Sanyo Electric Co Ltd
Sanyo Electric 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 Tokyo Sanyo Electric Co Ltd, Sanyo Electric Co Ltd filed Critical Tokyo Sanyo Electric Co Ltd
Priority to JP2600379A priority Critical patent/JPS5920287B2/en
Publication of JPS55118217A publication Critical patent/JPS55118217A/en
Publication of JPS5920287B2 publication Critical patent/JPS5920287B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
    • H03J1/0033—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor for voltage synthesis with a D/A converter

Abstract

PURPOSE:To make constant the time required for channel selection for all the bands, by changing the clock of counter every band. CONSTITUTION:The up and down counter 11 performs up or down count with the indication of the control circuit 13. When search is made near the desired broadcast signal, S-curve signal is generated from the detection circuit 15. The window comparator 16 operates so that the tuning shift is corrected with this S-curve signal and tuning is made by the up and down counter 11 counted with the low speed clock. Since the width of channel is different about five times in medium and long waves, the count speed is selected at AFC operated with the window comparator 16 in interlocking with the band selection so that the search time can be kept constant at all times. In this case, the medium waves, for example, taken 1/5 times to the long waves.
JP2600379A 1979-03-05 1979-03-05 digital tuner Expired JPS5920287B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2600379A JPS5920287B2 (en) 1979-03-05 1979-03-05 digital tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2600379A JPS5920287B2 (en) 1979-03-05 1979-03-05 digital tuner

Publications (2)

Publication Number Publication Date
JPS55118217A true JPS55118217A (en) 1980-09-11
JPS5920287B2 JPS5920287B2 (en) 1984-05-12

Family

ID=12181520

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2600379A Expired JPS5920287B2 (en) 1979-03-05 1979-03-05 digital tuner

Country Status (1)

Country Link
JP (1) JPS5920287B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6218814A (en) * 1985-07-17 1987-01-27 Sharp Corp Receiving circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0348886A (en) * 1989-07-18 1991-03-01 Moriaki Matsushita Sign display method and sign

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6218814A (en) * 1985-07-17 1987-01-27 Sharp Corp Receiving circuit

Also Published As

Publication number Publication date
JPS5920287B2 (en) 1984-05-12

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