JPS63171038U - - Google Patents

Info

Publication number
JPS63171038U
JPS63171038U JP1987197242U JP19724287U JPS63171038U JP S63171038 U JPS63171038 U JP S63171038U JP 1987197242 U JP1987197242 U JP 1987197242U JP 19724287 U JP19724287 U JP 19724287U JP S63171038 U JPS63171038 U JP S63171038U
Authority
JP
Japan
Prior art keywords
transistors
section
flop
flip
output terminals
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
JP1987197242U
Other languages
Japanese (ja)
Other versions
JPH0339956Y2 (en
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 filed Critical
Publication of JPS63171038U publication Critical patent/JPS63171038U/ja
Application granted granted Critical
Publication of JPH0339956Y2 publication Critical patent/JPH0339956Y2/ja
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H03J5/242—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
    • H03J5/244—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection using electronic means
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D5/00—Circuits for demodulating amplitude-modulated or angle-modulated oscillations at will

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Noise Elimination (AREA)
  • Circuits Of Receivers In General (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の実施例の回路図、第２図(い)
〜(ち)は第１図の回路中の各点における信号を示
す波形図、第３図は従来のＡＭ／ＦＭ帯域選択装
置の回路図である。 １……ＡＭ受信部、２……ＦＭ受信部、３……
定電圧部、４，５……表示部、６……パルス正極
性成分検出部、７……フリツプフロツプ、８……
スイツチング部。 Figure 1 is a circuit diagram of an embodiment of the present invention, Figure 2 (a)
-(c) are waveform diagrams showing signals at each point in the circuit of FIG. 1, and FIG. 3 is a circuit diagram of a conventional AM/FM band selection device. 1...AM receiving section, 2...FM receiving section, 3...
Constant voltage section, 4, 5...Display section, 6...Pulse positive polarity component detection section, 7...Flip-flop, 8...
Switching part.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ＡＭ受信部及びＦＭ受信部からの出力信号をア
ナログスイツチを通じて出力端子に出力するよう
にしたＡＭ／ＦＭ帯域選択装置において、電源Ｂ
＋を、ツエナーダイオードＺＤ１、及びトランジ
スタＱ１を有する定電圧部３を通じて、トランジ
スタＱ２，Ｑ３及びツエナーダイオードＺＤ２，
ＺＤ３を有するスイツチング部８のトランジスタ
Ｑ２，Ｑ３に接続し、スイツチング部８の２つの
出力端子を、発光ダイオードＬＤ１，ＬＤ２を有
する表示部４，５を通じて、ＡＭ受信部１とＦＭ
受信部２のそれぞれの電源端子に接続し、スイツ
チング部８のトランジスタＱ２，Ｑ３の各ベース
をツエナーダイオードＺＤ２，ＺＤ３を通じてフ
リツプフロツプ７の出力端子Ｑ，にそれぞれ接
続し、フリツプフロツプ７の出力端子Ｑ，を、
アナログスイツチＧ３，Ｇ４及びＧ１，Ｇ２の制
御端子にそれぞれ連結すると共に、トランジスタ
Ｑ４，Ｑ５、ダイオードＤ１，Ｄ２及びコンデン
サＧ３，Ｇ４を有するパルス正極性成分検出部６
のトランジスタＱ４，Ｑ５のベースにコンデンサ
Ｃ３，Ｃ４を通じて接続し、パルス正極成分検出
部６の出力端子を接地コンデンサＣ５、インバー
タＩ１を通じてエミツタ接地トランジスタＱ６，
Ｑ７のベースに接続し、トランジスタＱ６，Ｑ９
のコレクタをフリツプフロツプ７の出力端子，
Ｑに連結し、フリツプフロツプ７のクロツク入力
端子をスイツチＳＷ１の可動子接点ｃに連結し、
固定接点ａは接地し、そして固定接点ｂはフリツ
プフロツプ７の入力端子Ｔに接続したことを特徴
とするＡＭ／ＦＭ帯域選択装置。 In an AM/FM band selection device that outputs output signals from an AM reception section and an FM reception section to an output terminal through an analog switch, a power supply B
+ through the constant voltage section 3 having the Zener diode ZD 1 and the transistor Q 1 , and the transistors Q 2 , Q 3 and the Zener diode ZD 2 ,
The two output terminals of the switching section 8 are connected to the transistors Q 2 and Q 3 of the switching section 8 having the switch ZD 3 , and the two output terminals of the switching section 8 are connected to the AM receiving section 1 and FM through the display sections 4 and 5 having the light emitting diodes LD 1 and LD 2 .
The bases of the transistors Q 2 and Q 3 of the switching unit 8 are connected to the output terminals Q of the flip-flop 7 through Zener diodes ZD 2 and ZD 3 , respectively, and the output terminals of the flip-flop 7 are terminal Q,
A pulse positive polarity component detection section connected to the control terminals of analog switches G 3 , G 4 and G 1 , G 2 , respectively, and including transistors Q 4 , Q 5 , diodes D 1 , D 2 , and capacitors G 3 , G 4 . 6
are connected to the bases of the transistors Q 4 and Q 5 through capacitors C 3 and C 4 , and the output terminal of the pulse positive polarity component detection section 6 is connected to the grounded capacitor C 5 and the emitter-grounded transistor Q 6 , through an inverter I 1 .
Connected to the base of Q 7 and connected to the base of transistors Q 6 and Q 9
 The collector of is connected to the output terminal of flip-flop 7,
Q, and connect the clock input terminal of flip-flop 7 to mover contact c of switch SW 1 .
An AM/FM band selection device characterized in that a fixed contact a is grounded, and a fixed contact b is connected to an input terminal T of a flip-flop 7.
JP1987197242U 1986-12-29 1987-12-25 Expired JPH0339956Y2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019860021526U KR900003409Y1 (en) 1986-12-29 1986-12-29 Am/fm band selection device

Publications (2)

Publication Number Publication Date
JPS63171038U true JPS63171038U (en) 1988-11-08
JPH0339956Y2 JPH0339956Y2 (en) 1991-08-22

Family

ID=19258468

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987197242U Expired JPH0339956Y2 (en) 1986-12-29 1987-12-25

Country Status (4)

Country Link
JP (1) JPH0339956Y2 (en)
KR (1) KR900003409Y1 (en)
CA (1) CA1309144C (en)
DE (1) DE3744471C2 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3745467A (en) * 1971-09-10 1973-07-10 Motorola Inc Multi-band radio receiver
DE3127889C2 (en) * 1981-07-15 1984-05-30 Telefunken electronic GmbH, 7100 Heilbronn Circuit arrangement made up of at least two amplifiers
JPS59128834A (en) * 1983-01-13 1984-07-25 Matsushita Electric Ind Co Ltd Frequency band switching device

Also Published As

Publication number Publication date
KR900003409Y1 (en) 1990-04-23
DE3744471C2 (en) 1994-09-22
DE3744471A1 (en) 1988-07-07
CA1309144C (en) 1992-10-20
JPH0339956Y2 (en) 1991-08-22
KR880013893U (en) 1988-08-30

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