JPH0367363B2 - - Google Patents
Info
- Publication number
- JPH0367363B2 JPH0367363B2 JP57204071A JP20407182A JPH0367363B2 JP H0367363 B2 JPH0367363 B2 JP H0367363B2 JP 57204071 A JP57204071 A JP 57204071A JP 20407182 A JP20407182 A JP 20407182A JP H0367363 B2 JPH0367363 B2 JP H0367363B2
- Authority
- JP
- Japan
- Prior art keywords
- crystal
- channel
- oscillation circuit
- crystal resonator
- resonator
- 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.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
- H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
- H03B5/36—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device
- H03B5/366—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device and comprising means for varying the frequency by a variable voltage or current
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は水晶振動子を用いた多チヤンネルの発
振信号を発生させる水晶発振回路に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a crystal oscillation circuit that uses a crystal resonator to generate multi-channel oscillation signals.
従来例の構成とその問題点
通常の水晶振動子を用いた多チヤンネル発振回
路においては、振動子の挿入されていないチヤン
ネル、いわゆる空チヤンネルの検出は、発振回路
の出力を検波の上で直流増幅して表示する方法等
によつていたために、回路が複雑化して高コスト
になる欠点があつた。Conventional configuration and its problems In a multi-channel oscillation circuit using a normal crystal resonator, the detection of channels in which no resonator is inserted, so-called empty channels, is done by detecting the output of the oscillation circuit and then amplifying the DC current. However, the disadvantage was that the circuitry was complicated and the cost was high.
発明の目的
本発明は上記従来例の欠点を除去し、簡単な構
造でしかも確実な空チヤンネルの検出の行なえる
水晶発振回路を提供することを目的としている。OBJECTS OF THE INVENTION It is an object of the present invention to eliminate the drawbacks of the above-mentioned conventional examples and to provide a crystal oscillation circuit that has a simple structure and can reliably detect empty channels.
発明の構成
本発明は、水晶片（振動素子）と並列に接続し
た抵抗を容器内に封じ込んで水晶振動子を構成し
ソケツトに挿入して発振回路と組み合せて水晶発
振回路を形成し、水晶振動子の挿入の有無を前記
抵抗を介して直流の流入の有無により検出、表示
するように構成したものである。Structure of the Invention The present invention comprises a crystal resonator by sealing a resistor connected in parallel with a crystal piece (vibration element) in a container, inserting it into a socket and combining it with an oscillation circuit to form a crystal oscillation circuit. The presence or absence of the insertion of the vibrator is detected and displayed by the presence or absence of direct current flowing through the resistor.
実施例の説明
以下本発明の一実施例について図面と共に説明
する。第１図において、１，２は水晶振動子４の
電気端子、９は発振子としての水晶片、１０は抵
抗である。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 and 2 are electrical terminals of a crystal resonator 4, 9 is a crystal piece serving as an oscillator, and 10 is a resistor.
第２図は、３チヤンネル（ａ〜ｃ）の水晶振動
子（４ａ〜４ｃ）が挿入可能な発振回路の例を示
すもので、１ａ〜１ｃ及び２ａ〜２ｃは、それぞ
れ水晶振動子（４ａ〜４ｃ）用のソケツト、３ａ
〜３ｃはそれぞれダイオード、５は端子ａ〜ｃを
有するチヤンネル切換スイツチ、６は発振回路、
７は直流比較回路、８は表示回路、１１，１２及
び１８〜２０は抵抗、１３〜１７はコンデンサ、
Ａはコンデンサー１３を介して発振回路６に接続
される結合点である。なお、上例ではソケツト１
Ｃ，２Ｃは空の状態を示している。 FIG. 2 shows an example of an oscillation circuit into which three channels (a to c) of crystal resonators (4a to 4c) can be inserted. 4c) socket for 3a
-3c are diodes, 5 is a channel changeover switch having terminals a to c, 6 is an oscillation circuit,
7 is a DC comparison circuit, 8 is a display circuit, 11, 12 and 18-20 are resistors, 13-17 are capacitors,
A is a coupling point connected to the oscillation circuit 6 via a capacitor 13. In addition, in the above example, socket 1
C and 2C indicate an empty state.
次に動作を説明する。チヤンネル切換スイツチ
５により、電気端子１a′〜１c′及び２a′〜２c′に
よりソケツト１ａ〜１ｃ及び２ａ〜２ｃに差し込
んだ水晶振動子４ａ〜４ｃのいずれかを選択すれ
ば、ソケツト１ｃ，２ｃの空チヤンネルでなけれ
ば、発振回路６により前記水晶振動子に個有の発
振出力が得られる。この時水晶振動子４が挿入さ
れているチヤンネルａ，ｂでは電源電圧（B+）
が抵抗１１、ダイオード３ａ〜３ｂのいずれか
と、抵抗１０、スイツチ５を経由してグランド
（アース）に流れるので、結合点Ａの直流電位が
低下する。したがつて、これを直流比較回路で検
出して表示器８により、たとえば第１の表示素子
を点灯するなどして表示する。一方空チヤンネル
Ｃではスイツチ５によつてそのチヤンネルを選択
しても直流電流が流れないため結合点Ａの電圧が
上昇する。したがつて、水晶振動子を接続したチ
ヤンネルａ，ｂとはこの点で充分に区別すること
ができ表示器８によつてたとえば第２の表示素子
を点灯するなどしてその表示を異ならせることが
できる。 Next, the operation will be explained. If one of the crystal oscillators 4a to 4c inserted into the sockets 1a to 1c and 2a to 2c is selected by the channel changeover switch 5 through the electric terminals 1a' to 1c' and 2a' to 2c', the sockets 1c and 2c are selected. If the channel is not empty, the oscillation circuit 6 provides an oscillation output unique to the crystal resonator. At this time, the power supply voltage (B + ) in channels a and b where the crystal resonator 4 is inserted is
flows to the ground (earth) via the resistor 11, one of the diodes 3a to 3b, the resistor 10, and the switch 5, so the DC potential at the connection point A decreases. Therefore, this is detected by the DC comparator circuit and displayed on the display 8 by, for example, lighting up the first display element. On the other hand, in the empty channel C, even if the channel is selected by the switch 5, no direct current flows, so the voltage at the node A increases. Therefore, channels a and b to which the crystal oscillators are connected can be sufficiently distinguished in this respect, and the display can be made different by, for example, lighting the second display element on the display 8. I can do it.
なお、表示器８では空チヤンネルのみあるいは
水晶振動子が接続されたチヤンネルのみ表示素子
を点灯するようにしてもよく、この場合には他方
のチヤンネルにおいてはそれが選択されても表示
素子が点灯しないことから両者を正確に区別して
表示することができる。また、抵抗１８〜２０は
スイツチ５のオフ時にダイオードに逆バイアスを
掛けて回路のアイソレーシヨンをとるための抵
抗、コンデンサ１５〜１７は高周波バイパス用で
ある。 In the display device 8, the display element may be turned on only in an empty channel or only in a channel to which a crystal oscillator is connected; in this case, the display element in the other channel will not be turned on even if it is selected. Therefore, the two can be accurately distinguished and displayed. Further, resistors 18 to 20 are resistors for applying a reverse bias to the diode to provide circuit isolation when the switch 5 is off, and capacitors 15 to 17 are for high frequency bypass.
発明の効果
以上説明したように本発明によれば、水晶振動
子の容器内部に水晶片と並列に抵抗を内蔵してい
るので、水晶振動子のソケツトへの挿入の有無を
前記抵抗への直流電流の通過により簡単に検出出
来る。また水晶片に抵抗が並列接続されることに
なるので、ダンピング等の不要発振モードの抑圧
効果も得られる利点がある。Effects of the Invention As explained above, according to the present invention, since a resistor is built in the crystal resonator container in parallel with the crystal piece, whether or not the crystal resonator is inserted into the socket can be determined by direct current to the resistor. It can be easily detected by passing current. Furthermore, since a resistor is connected in parallel to the crystal piece, there is an advantage that an effect of suppressing unnecessary oscillation modes such as damping can be obtained.
第１図は本発明の一実施例による水晶発振回路
に用いる水晶振動子の回路図、第２図はその発振
回路のブロツク図である。
４……水晶振動子、５……チヤンネル切換スイ
ツチ、６……発振回路、７……直流比較回路、８
……表示器、９……水晶片、１０……抵抗。
FIG. 1 is a circuit diagram of a crystal resonator used in a crystal oscillation circuit according to an embodiment of the present invention, and FIG. 2 is a block diagram of the oscillation circuit. 4...Crystal resonator, 5...Channel selection switch, 6...Oscillation circuit, 7...DC comparison circuit, 8
...Display device, 9...Crystal piece, 10...Resistance.
Claims (1)
路と、所要チヤンネルの水晶振動子を選択発振さ
せるチヤンネル切換スイツチを備え、前記各水晶
振動子の内部に、発振子と並列接続した抵抗を設
けておき、前記チヤンネル選択時に、前記水晶振
動子への直流電流の流入の有無を検出して、表示
器により水晶振動子の挿入の有無をそれぞれ区別
して表示できるように構成した水晶発振回路。1.Equipped with an oscillation circuit in which a plurality of crystal resonators are removably installed, a channel switching switch that selectively oscillates the crystal resonator of a required channel, and a resistor connected in parallel with the resonator is provided inside each crystal resonator. and a crystal oscillation circuit configured to detect the presence or absence of direct current flowing into the crystal resonator when selecting the channel, and to distinguishably display whether or not the crystal resonator is inserted on a display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57204071A JPS5992602A (en) | 1982-11-19 | 1982-11-19 | crystal oscillation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57204071A JPS5992602A (en) | 1982-11-19 | 1982-11-19 | crystal oscillation circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5992602A JPS5992602A (en) | 1984-05-28 |
| JPH0367363B2 true JPH0367363B2 (en) | 1991-10-22 |
Family
ID=16484277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57204071A Granted JPS5992602A (en) | 1982-11-19 | 1982-11-19 | crystal oscillation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5992602A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007049254A (en) * | 2005-08-08 | 2007-02-22 | Nippon Dempa Kogyo Co Ltd | Crystal oscillator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6223126Y2 (en) * | 1980-03-25 | 1987-06-12 |
-
1982
- 1982-11-19 JP JP57204071A patent/JPS5992602A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5992602A (en) | 1984-05-28 |
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