JPH0787368B2 - Externally controlled atomic oscillator - Google Patents
Externally controlled atomic oscillatorInfo
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- JPH0787368B2 JPH0787368B2 JP19838687A JP19838687A JPH0787368B2 JP H0787368 B2 JPH0787368 B2 JP H0787368B2 JP 19838687 A JP19838687 A JP 19838687A JP 19838687 A JP19838687 A JP 19838687A JP H0787368 B2 JPH0787368 B2 JP H0787368B2
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- atomic oscillator
- frequency
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Description
【発明の詳細な説明】 〔概要〕 外部信号の周波数と原子発振器の周波数の差Δｆを表す
正負極性の直流電圧Ａを固定バイアス電圧Voに加算し
て、加算された出力電圧Ｖにより原子発振器のＣ磁界コ
イルの電流icを制御して、原子発振器の発振周波数を外
部信号の周波数に同期させるPLL制御の外部制御型原子
発振器の改良であって、前記直流電圧Ａの正入力と負入
力に対する出力電圧Ｖの比を異なる値にして出力する制
御電圧補正回路を設けることにより、該直流電圧Ａの正
負の変化に対して発振周波数の変化Δｆが正しく比例し
て均一となるようにして、PLL制御ループの安定度を改
良した外部制御型原子発振器。DETAILED DESCRIPTION OF THE INVENTION [Outline] A positive / negative DC voltage A representing a difference Δf between the frequency of an external signal and the frequency of an atomic oscillator is added to a fixed bias voltage Vo, and the added output voltage V is used to output the atomic oscillator. An improved external control type atomic oscillator of PLL control for controlling the current ic of the C magnetic field coil to synchronize the oscillation frequency of the atomic oscillator with the frequency of an external signal, the output for the positive input and the negative input of the DC voltage A By providing a control voltage correction circuit that outputs different ratios of the voltage V, the change Δf of the oscillating frequency is proportional to the positive / negative change of the DC voltage A, and is made uniform so that the PLL control is performed. Externally controlled atomic oscillator with improved loop stability.
本発明は外部信号の周波数に同期した周波数の信号を発
振する原子発振器、即ち外部制御型原子発振器の改良に
関する。The present invention relates to an improvement of an atomic oscillator that oscillates a signal having a frequency synchronized with the frequency of an external signal, that is, an externally controlled atomic oscillator.
原子や分子の共鳴周波数を利用して内蔵の水晶発振器の
周波数を制御する原子発振器は、高い周波数安定度が得
られるため、色々の分野で高精度の周波数源として用い
られている。これまでは、原子発振器は全て規準発振
器、即ち周波数の固定された発振器として用いられて来
たが、近年、通信放送の分野で原子発振器の発振周波数
を、周波数が僅か異なる外部信号の周波数に位相同期さ
せて利用する必要が高まっている。この需要に応えるに
は、外部からの制御信号によって、発振周波数を制御す
ることの可能な原子発振器を実現することが不可欠であ
り、その実現方法として幾つかの方法があるが、本発明
はその方法の１つである原子発振器の所謂Ｃ磁界コイル
の電流icを外部信号による所謂PLL制御により制御する
方法に関する。PLL制御によりＣ磁界電流icを外部信号
により制御する外部制御型原子発振器としては、誤差信
号であるＣ磁界電流icを流す制御電圧Ｖの正側および負
側の一定変化に対して、原子発振器の発振周波数が正し
く比例して変化することがPLL制御の安定度上望まれて
いる。An atomic oscillator that controls the frequency of a built-in crystal oscillator by using the resonance frequency of atoms and molecules is used as a highly accurate frequency source in various fields because high frequency stability can be obtained. Until now, all atomic oscillators have been used as reference oscillators, that is, oscillators with a fixed frequency.In recent years, however, in the field of communication broadcasting, the oscillation frequency of an atomic oscillator has been set to the frequency of an external signal whose frequency is slightly different. There is an increasing need to use them in synchronization. In order to meet this demand, it is indispensable to realize an atomic oscillator capable of controlling the oscillation frequency by a control signal from the outside, and there are several methods for realizing the atomic oscillator. The present invention relates to a method of controlling the current ic of a so-called C magnetic field coil of an atomic oscillator, which is one of the methods, by so-called PLL control by an external signal. An external control type atomic oscillator that controls the C magnetic field current ic by an external signal by PLL control is an atomic oscillator of an atomic oscillator with respect to a constant change on the positive side and the negative side of a control voltage V that causes a C magnetic field current ic that is an error signal. It is desirable for the stability of PLL control that the oscillation frequency changes in proportion.
外部制御型原子発振器の従来の回路構成を第４図に示
す。A conventional circuit configuration of an externally controlled atomic oscillator is shown in FIG.
周波数ｆ±Δｆを発振する原子発振器１の発振信号は、
周波数ｆの外部信号と乗算器10で乗算され、原子発振器
１の発振周波数ｆ±Δｆと外部信号の周波数ｆとの差周
波数Δｆを表すディジタル信号Ｄを発生する。ディジタ
ル信号Ｄは、ディジタル／アナログ変換器20において、
一定振幅の正負の直流電圧のアナログの制御信号電圧Ａ
に変換されたのち、加算器２へ入力される。加算器２へ
入力される。加算器２は、入力された正負の一定電圧Ａ
に固定バイアスの直流電圧Voを加算し、出力電圧Ｖ（＝
Vo±Ａ）を出力し、該出力電圧Ｖを抵抗を通してＣ磁界
コイル３に印加し所定のＣ磁界電流icを流す。そしてＣ
磁界電流icの変化値が原子発振器１の発振信号の周波数
の変化量Δｆを決定する。The oscillation signal of the atomic oscillator 1 that oscillates at frequencies f ± Δf is
An external signal having a frequency f is multiplied by a multiplier 10 to generate a digital signal D representing a difference frequency Δf between the oscillation frequency f ± Δf of the atomic oscillator 1 and the frequency f of the external signal. The digital signal D is converted by the digital / analog converter 20.
Analog control signal voltage A of positive and negative DC voltage with constant amplitude
After being converted to, it is input to the adder 2. It is input to the adder 2. The adder 2 receives the input positive and negative constant voltage A
DC voltage Vo with a fixed bias is added to the output voltage V (=
Vo ± A), and the output voltage V is applied to the C magnetic field coil 3 through a resistor to flow a predetermined C magnetic field current ic. And C
The change value of the magnetic field current ic determines the change amount Δf of the frequency of the oscillation signal of the atomic oscillator 1.
ところで、Ｃ磁界コイル３に流れるＣ磁界電流icと原子
発振器１の発振周波数ｆの関係は、原子物理の原理によ
り、第５図Ａに示す如く、発振周波数の変化量Δf/fの
値がicの自乗に比例する関係となっている。By the way, regarding the relationship between the C magnetic field current ic flowing in the C magnetic field coil 3 and the oscillation frequency f of the atomic oscillator 1, the value of the variation Δf / f of the oscillation frequency is ic as shown in FIG. The relationship is proportional to the square of.
このため、正負の制御信号電圧Ａと、Ｃ磁界コイル３に
Ｃ磁界電流icを流す加算器２の出力電圧Ｖとの比（直流
ゲイン）を単純に１とする従来例の構成では、加算器２
の出力電圧Ｖが、固定バイアス電圧Voに正負の制御信号
電圧Ａが加算され出力する時、即ち正の制御信号電圧Ａ
を加算してＣ磁界電流icを増加する時と、負の制御信号
電圧Ａを加算する、つまり減算して、Ｃ磁界電流icを減
少する時に、同じＣ磁界電流icを中心とする場合でも、
原子発振器１の発振周波数ｆの変化量Δｆは、第５図Ｂ
に示す如く、異る値になる。このため、原子発振器１と
乗算器10とD/A変換器20と加算器２とＣ磁界コイル３で
構成する位相同期ループPLLのループ利得、即ち制御信
号電圧Ａの一定変化に対する原子発振器１の発振周波数
ｆの変化量Δｆの値が変動する。従って、一定の正負の
電圧Ａを制御信号とするディジタル制御のPLLの場合
は、制御信号１ビットの１ステップで制御され変化する
原子発振器１の発振周波数の変化量Δｆが、制御信号の
正側と負側で不均一となり、位相同期ループPLLの周波
数安定度に悪い影響を及ぼすという問題を生じる。Therefore, in the configuration of the conventional example in which the ratio (DC gain) between the positive / negative control signal voltage A and the output voltage V of the adder 2 for flowing the C magnetic field current ic to the C magnetic field coil 3 is simply 1, Two
Output voltage V of the positive bias signal Vo is added to the fixed bias voltage Vo to output, that is, the positive control signal voltage A
Is added to increase the C magnetic field current ic and the negative control signal voltage A is added, that is, subtracted to decrease the C magnetic field current ic, even when the same C magnetic field current ic is centered,
The variation Δf of the oscillation frequency f of the atomic oscillator 1 is shown in FIG.
As shown in, the values are different. Therefore, the loop gain of the phase locked loop PLL composed of the atomic oscillator 1, the multiplier 10, the D / A converter 20, the adder 2 and the C magnetic field coil 3, that is, the atomic oscillator 1 with respect to a constant change of the control signal voltage A The value of the change amount Δf of the oscillation frequency f changes. Therefore, in the case of a digitally controlled PLL that uses a constant positive and negative voltage A as a control signal, the change amount Δf of the oscillation frequency of the atomic oscillator 1 controlled and changed in one step of 1 bit of the control signal is the positive side of the control signal. And becomes negative on the negative side, which adversely affects the frequency stability of the phase-locked loop PLL.
上記問題点は本発明により第１図に示す如く、原子発振
器（１）の発振周波数と外部信号の周波数との差Δｆを
表わすデイジタル信号Ｄを、D/A変換器（20）で一定の
直流電圧が正と負に変換するアナログの制御信号電圧Ａ
に変換し、この制御信号電圧Ａに加算器（２）で一定の
直流の固定バイアス電圧V0を加算し、加算された出力電
圧Ｖを原子発振器（１）のＣ磁界コイル（３）に印加し
て電流icを流し、電流icの発生するＣ磁界により原子発
振器（１）の発振周波数と外部信号の周波数との差Δｆ
が零になるように制御する外部制御型原子発振器におい
て、 D/A変換器（20）と加算器（２）との間に制御電圧補正
回路（４）を設け、 制御電圧補正回路は、入力する制御信号電圧Ａの正又は
負の電圧値を、 固定バイアス電圧が加算された状態で制御電圧と発振周
波数の変化量を示す曲線上において、 正側の制御電圧による発振周波数の変化量が、負側の制
御電圧による発振周波数の変化量と等しくなる如く補正
することを特徴とする外部制御型原子発振器によって解
決される。According to the present invention, as described above, the above-mentioned problem is that a digital signal D representing the difference Δf between the oscillation frequency of the atomic oscillator (1) and the frequency of the external signal is fed to the D / A converter (20) at a constant direct current. Analog control signal voltage A for converting voltage to positive and negative
And a constant DC fixed bias voltage V 0 is added to the control signal voltage A by the adder (2), and the added output voltage V is applied to the C magnetic field coil (3) of the atomic oscillator (1). Then, the current ic is caused to flow, and the C magnetic field generated by the current ic causes the difference Δf between the oscillation frequency of the atomic oscillator (1) and the frequency of the external signal.
In an externally controlled atomic oscillator that controls to zero, a control voltage correction circuit (4) is provided between the D / A converter (20) and the adder (2). The positive or negative voltage value of the control signal voltage A on the curve showing the change amount of the control voltage and the oscillation frequency with the fixed bias voltage added, the change amount of the oscillation frequency by the positive side control voltage is This is solved by an externally controlled atomic oscillator, which is characterized in that the amount of change in the oscillation frequency due to the negative side control voltage is corrected to be equal.
第１図の原理ブロック図において、 １は、周波数ｆ±Δｆを発振する原子発振器、 10は、原子発振器１の発振信号と外部から与えられる周
波数ｆの外部信号とを乗算し、原子発振器１の発振周波
数ｆ±Δｆと外部信号の周波数ｆの差周波数Δｆを表す
ディジタル信号Ｄを出力する乗算器、 20は、乗算器10の出力のディジタル信号Ｄをアナログの
正負極性の制御信号電圧Ａに変換するD/A変換器、 ２は、D/A変換器20の正負の制御信号電圧Ａを入力し固
定バイアス電圧Voと加算して、出力電圧Ｖ（＝Vo±Ａ）
を出力する加算器、 ３は、加算器２の出力電圧Ｖにより所定の電流icを流し
所定の強さのＣ磁界を発生して原子発振器１に結合する
Ｃ磁界コイル、 ４は、D/A変換器20の出力の制御信号電圧Ａの正入力に
対する出力電圧Ｃの比を制御信号電圧Ａの負入力に対す
る出力電圧Ｃの比と異なるようにして出力電圧Ｃを出力
する制御電圧補正回路であって、 制御電圧補正回路４の出力電圧Ｃを前記加算器２に入力
するように構成する。In the principle block diagram of FIG. 1, 1 is an atomic oscillator that oscillates at a frequency f ± Δf, and 10 is a multiplier of an atomic oscillator 1 oscillation signal and an externally-applied external signal at a frequency f. A multiplier that outputs a digital signal D that represents a difference frequency Δf between the oscillation frequency f ± Δf and the frequency f of the external signal, and 20 that converts the digital signal D output from the multiplier 10 into an analog positive / negative control signal voltage A. D / A converter, 2 inputs the positive / negative control signal voltage A of the D / A converter 20, adds it to the fixed bias voltage Vo, and outputs the output voltage V (= Vo ± A)
Is a C magnetic field coil which is coupled to the atomic oscillator 1 by generating a C magnetic field of a predetermined intensity by flowing a predetermined current ic by the output voltage V of the adder 2, and 4 is a D / A A control voltage correction circuit that outputs the output voltage C by making the ratio of the output voltage C to the positive input of the control signal voltage A of the output of the converter 20 different from the ratio of the output voltage C to the negative input of the control signal voltage A. Then, the output voltage C of the control voltage correction circuit 4 is input to the adder 2.
原子発振器１は、周波数ｆ±Δｆを発振し、原子発振器
１の発振信号は外部から与えられる周波数ｆの外部信号
と、乗算器10において乗算され、原子発振器１の発振周
波数ｆ±Δｆと外部信号の周波数ｆの差周波数Δｆを表
すディジタル信号Ｄを誤差信号として出力する。The atomic oscillator 1 oscillates at a frequency f ± Δf, and the oscillation signal of the atomic oscillator 1 is multiplied by an external signal of a frequency f given from the outside in a multiplier 10 to obtain an oscillation frequency f ± Δf of the atomic oscillator 1 and an external signal. The digital signal D representing the difference frequency Δf of the frequency f is output as an error signal.
D/A変換器20は、乗算器10の出力のディジタル信号Ｄを
アナログの正極性と負極性の制御信号電圧Ａに変換し
て、その正負の制御電圧Ａを制御電圧補正回路４に入力
する。The D / A converter 20 converts the digital signal D output from the multiplier 10 into an analog positive and negative control signal voltage A, and inputs the positive and negative control voltage A to the control voltage correction circuit 4. .
制御電圧補正回路４は、D/A変換器20からの正負の信号
電圧Ａを入力して、正入力Ａに対する出力電圧Ｃの比と
負入力Ａに対する出力電圧Ｃの比が異なるようにして出
力電圧Ｃを出力する。The control voltage correction circuit 4 inputs the positive and negative signal voltages A from the D / A converter 20 and outputs them with different ratios of the output voltage C to the positive input A and the output voltage C to the negative input A. Output voltage C.
正入力Ａに対する出力電圧Ｃと、負入力Ａに対する出力
電圧Ｃは異なる値となる。The output voltage C for the positive input A and the output voltage C for the negative input A have different values.
加算器２は、制御電圧補正回路４からの出力電圧Ｃを入
力し固定の直流電圧Voと加算して出力電圧Ｖを出力する
が、制御電圧補正回路４からの出力電圧Ｃが、制御信号
電圧Ａの正負で異なる値なので、加算器２の出力電圧Ｖ
も、制御信号電圧Ａの正負で異なる値となる。従って、
加算器２の出力電圧ＶによりＣ磁界コイル３に流れる電
流icも制御信号電圧Ａの正負で異なる値となる。The adder 2 inputs the output voltage C from the control voltage correction circuit 4 and adds it to the fixed DC voltage Vo to output the output voltage V. The output voltage C from the control voltage correction circuit 4 is the control signal voltage. Since the positive and negative values of A are different, the output voltage V of the adder 2
Also has different values depending on whether the control signal voltage A is positive or negative. Therefore,
The output voltage V of the adder 2 causes the current ic flowing in the C magnetic field coil 3 to have different values depending on whether the control signal voltage A is positive or negative.
従って、Ｃ磁界コイル３に流れる電流icの自乗で定まる
原子発振器１の発振周波数の変化量Δｆは、従来例と異
なって、制御信号電圧Ａの正負で同じ値になし得て、PL
L制御の安定度の問題は解決される。Therefore, the amount of change Δf of the oscillation frequency of the atomic oscillator 1 determined by the square of the current ic flowing in the C magnetic field coil 3 can be set to the same value depending on whether the control signal voltage A is positive or negative, unlike the conventional example.
The stability problem of L control is solved.
第２図は、本発明の実施例の外部制御型原子発振器の構
成を示すブロック図であって、第３図はその動作を説明
するための説明図である。FIG. 2 is a block diagram showing the configuration of an externally controlled atomic oscillator according to an embodiment of the present invention, and FIG. 3 is an explanatory diagram for explaining its operation.
第２図において、原子発振器１と乗算器10とD/A変換器2
0と加算器２とＣ磁界コイル３は従来技術の項で従来例
の第３図のブロック図により説明した同一番号のものと
同じ機能をもつ。In FIG. 2, the atomic oscillator 1, the multiplier 10 and the D / A converter 2 are shown.
0, the adder 2 and the C magnetic field coil 3 have the same functions as those having the same numbers explained in the prior art section with reference to the block diagram of FIG.
本発明の実施例で新設される第２図の制御電圧補正回路
４は、ダイオード回路41と圧縮器42と加算器43から成
り、ダイオード回路41は、第３図（ｂ）の動作説明図に
示す如く、D/A変換器20からの制御信号電圧Ａの正負入
力Ａの負側の電圧を理想的にカットし、残った正側の入
力Ａを反転して反転出力を出力する反転型理想ダイオー
ド回路であって、圧縮器42は、ダイオード回路41の出力
の正側の反転出力を入力レベルに対して出力レベルを一
定傾斜で圧縮して出力電圧Ｂを出力する。第３図（ｂ）
は、圧縮器42の出力電圧Ｂを示し、ダイオード回路41と
圧縮器42の特性の和の回路特性を示す。第３図（ａ）
は、制御電圧補正回路４に入力する正負の入力Ａを入力
Ａの正負で等しく変換される出力電圧Ｄを示す。The control voltage correction circuit 4 of FIG. 2 newly provided in the embodiment of the present invention comprises a diode circuit 41, a compressor 42 and an adder 43. The diode circuit 41 is shown in the operation explanatory view of FIG. 3 (b). As shown, an inverting type ideal that ideally cuts the negative side voltage of the positive / negative input A of the control signal voltage A from the D / A converter 20 and inverts the remaining positive side input A to output an inverted output. In the diode circuit, the compressor 42 compresses the output on the positive side of the output of the diode circuit 41 at a constant slope with respect to the input level and outputs the output voltage B. Fig. 3 (b)
Shows the output voltage B of the compressor 42, and shows the circuit characteristic of the sum of the characteristics of the diode circuit 41 and the compressor 42. Fig. 3 (a)
Indicates an output voltage D in which a positive / negative input A input to the control voltage correction circuit 4 is converted into a positive / negative input A.
制御電圧補正回路４の加算器43は、圧縮器42の出力Ｂと
D/A変換器20の出力Ａの変換出力Ｄを入力して加算して
第３図（ｃ）に示す出力電圧Ｃを出力するが、出力電圧
Ｃは、制御信号電圧の正入力Ａと負入力Ａで出力傾斜
（直流ゲイン）の異なる出力電圧Vc1と出力電圧Vc2を出
力する。The adder 43 of the control voltage correction circuit 4 and the output B of the compressor 42
The converted output D of the output A of the D / A converter 20 is input and added to output the output voltage C shown in FIG. 3 (c). The output voltage C is the positive input A of the control signal voltage and the negative input A. Output voltage Vc1 and output voltage Vc2 having different output slopes (DC gain) are output at input A.
制御電圧補正回路４の出力する電圧Vc1と電圧Vc2は、加
算器２において、制御信号電圧Ａの正入力と負入力で、
夫々固定のバイアス電圧Voと加算、減算され、加算器２
は出力電圧Ｖを出力する。即ち加算器２の出力電圧Ｖ
は、固定のバイアス電圧Voを中心として正側では電圧Vc
1だけ増加し、また、負側では電圧Vc2だけ減少して、抵
抗Ｒを通してＣ磁界コイル３に加えられ、所定のＣ磁界
電流icを流す。そしてそのＣ磁界電流icの値により原子
発振器１の発振周波数が決定される。The voltage Vc1 and the voltage Vc2 output from the control voltage correction circuit 4 are the positive input and the negative input of the control signal voltage A in the adder 2,
Add and subtract with the fixed bias voltage Vo respectively, and adder 2
Outputs an output voltage V. That is, the output voltage V of the adder 2
Is the voltage Vc on the positive side with a fixed bias voltage Vo as the center.
It is increased by 1 and decreased by the voltage Vc2 on the negative side, and is applied to the C magnetic field coil 3 through the resistor R to flow a predetermined C magnetic field current ic. Then, the oscillation frequency of the atomic oscillator 1 is determined by the value of the C magnetic field current ic.
制御電圧補正回路４の出力する電圧Vc1と電圧Vc2は、制
御信号電圧Ａの正入力と負入力で異なる直流ゲインによ
り変換された出力電圧なので互に異なった値をとる。従
って、Ｃ磁界コイル３に流れるＣ磁界電流icも制御信号
電圧Ａが正入力Ａの時と負入力Ａの時とで変化分が異な
る。そのため、原子発振器１の発振周波数の変化量Δｆ
は、従来例の自乗比例の関係と異なり直線比例の関係に
なり、制御信号電圧Ａの入力の正側と負側でΔｆが同じ
値となる。The voltage Vc1 and the voltage Vc2 output from the control voltage correction circuit 4 have different values because they are output voltages converted by different DC gains at the positive input and the negative input of the control signal voltage A. Therefore, the change amount of the C magnetic field current ic flowing through the C magnetic field coil 3 is different between when the control signal voltage A has the positive input A and when the control signal voltage A has the negative input A. Therefore, the variation Δf of the oscillation frequency of the atomic oscillator 1
Is a linear proportional relationship, unlike the square proportional relationship in the conventional example, and Δf has the same value on the positive side and the negative side of the input of the control signal voltage A.
第３図（ｄ）は、本実施例のＣ磁界コイル３に印加する
制御電圧Ｖに対する原子発振器１の発振周波数の周波数
変化Δf/fの関係を示すもので、横軸と縦軸の交点の制
御電圧Ｖの起点は、固定バイアス電圧Voに選んである。
固定バイアス電圧Voを中心として制御信号電圧Ａの正側
において、原子発振器１の発振周波数の周波数変化Δf/
fが略同じ値となり均一化される。FIG. 3 (d) shows the relationship of the frequency change Δf / f of the oscillation frequency of the atomic oscillator 1 with respect to the control voltage V applied to the C magnetic field coil 3 of the present embodiment, and shows the intersection of the horizontal axis and the vertical axis. The starting point of the control voltage V is selected as the fixed bias voltage Vo.
The frequency change Δf / of the oscillation frequency of the atomic oscillator 1 on the positive side of the control signal voltage A around the fixed bias voltage Vo.
f becomes approximately the same value and is made uniform.
従って、原子発振器１、乗算器10、D/A変換器20、制御
電圧補正回路４、加算器２、Ｃ磁界コイル３の構成する
PLL制御ループのループ利得がほぼ一定になるので、原
子発振器１の発振周波数の周波数制御の安定度が良くな
り問題は無い。Therefore, the atomic oscillator 1, the multiplier 10, the D / A converter 20, the control voltage correction circuit 4, the adder 2, and the C magnetic field coil 3 are configured.
Since the loop gain of the PLL control loop is almost constant, the stability of the frequency control of the oscillation frequency of the atomic oscillator 1 is improved and there is no problem.
以上説明した如く、本発明によれば、原子発振器の発振
周波数を位相同期ループにより外部信号の周波数に同期
させる外部制御型原子発振器の制御ループの安定度を良
くすることが出来るので、外部制御型原子発振器の応用
を拡げる効果が得られる。As described above, according to the present invention, the stability of the control loop of the external control type atomic oscillator in which the oscillation frequency of the atomic oscillator is synchronized with the frequency of the external signal by the phase locked loop can be improved. The effect of expanding the application of the atomic oscillator can be obtained.
第１図は本発明の外部制御型原子発振器の構成を示す原
理ブロック図、 第２図は本発明の実施例の外部制御型原子発振器の構成
を示すブロック図、 第３図は本発明の実施例の外部制御型原子発振器の動作
を説明するための動作説明図、 第４図は従来例の外部制御型原子発振器のブロック図、 第５図は従来例の外部制御型原子発振器の動作説明図で
ある。 第１図、第２図、第４図において、 １は原子発振器、 ２は加算器、 ３はＣ磁界コイル、 ４は制御電圧補正回路、 41はダイオード回路、 42は圧縮器、 43は加算器、 10は乗算器、 20はD/A変換器である。FIG. 1 is a block diagram showing the principle of an externally controlled atomic oscillator according to the present invention, FIG. 2 is a block diagram showing the externally controlled atomic oscillator according to an embodiment of the present invention, and FIG. An operation explanatory diagram for explaining the operation of the externally controlled atomic oscillator of the example, FIG. 4 is a block diagram of the externally controlled atomic oscillator of the conventional example, and FIG. 5 is an operational explanatory diagram of the externally controlled atomic oscillator of the conventional example. Is. 1, 2 and 4, 1 is an atomic oscillator, 2 is an adder, 3 is a C magnetic field coil, 4 is a control voltage correction circuit, 41 is a diode circuit, 42 is a compressor, and 43 is an adder. , 10 is a multiplier, and 20 is a D / A converter.
Claims (1)
の周波数との差Δｆを表わすデイジタル信号Ｄを、D/A
変換器（20）で一定の直流電圧が正と負に変換するアナ
ログの制御信号電圧Ａに変換し、この制御信号電圧Ａに
加算器（２）で一定の直流の固定バイアス電圧V0を加算
し、加算された出力電圧Ｖを原子発振器（１）のＣ磁界
コイル（３）に印加して電流icを流し、電流icの発生す
るＣ磁界により原子発振器（１）の発振周波数と外部信
号の周波数との差Δｆが零になるように制御する外部制
御型原子発振器において、 D/A変換器（20）と加算器（２）との間に制御電圧補正
回路（４）を設け、 制御電圧補正回路は、入力する制御信号電圧Ａの正又は
負の電圧値を、 固定バイアス電圧が加算された状態で制御電圧と発振周
波数の変化量を示す曲線上において、 正側の制御電圧による発振周波数の変化量が、負側の制
御電圧による発振周波数の変化量と等しくなる如く補正
することを特徴とする外部制御型原子発振器。1. A digital signal D representing the difference Δf between the oscillation frequency of an atomic oscillator (1) and the frequency of an external signal is D / A.
A converter (20) converts a constant DC voltage into an analog control signal voltage A that is converted into positive and negative, and an adder (2) adds a constant DC fixed bias voltage V 0 to the control signal voltage A. Then, the added output voltage V is applied to the C magnetic field coil (3) of the atomic oscillator (1) to flow a current ic, and the C magnetic field generated by the current ic causes the oscillation frequency of the atomic oscillator (1) and an external signal In the externally controlled atomic oscillator that controls so that the difference Δf with the frequency becomes zero, a control voltage correction circuit (4) is provided between the D / A converter (20) and the adder (2) The correction circuit indicates the positive or negative voltage value of the input control signal voltage A on the curve showing the change amount of the control voltage and the oscillation frequency in the state where the fixed bias voltage is added. Changes the oscillation frequency due to the negative control voltage. External control type atomic oscillator and correcting as equal to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19838687A JPH0787368B2 (en) | 1987-08-07 | 1987-08-07 | Externally controlled atomic oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19838687A JPH0787368B2 (en) | 1987-08-07 | 1987-08-07 | Externally controlled atomic oscillator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6441523A JPS6441523A (en) | 1989-02-13 |
| JPH0787368B2 true JPH0787368B2 (en) | 1995-09-20 |
Family
ID=16390262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19838687A Expired - Fee Related JPH0787368B2 (en) | 1987-08-07 | 1987-08-07 | Externally controlled atomic oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0787368B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016213608A (en) * | 2015-05-01 | 2016-12-15 | 株式会社リコー | Atomic oscillator and control method of atomic oscillator |
| CN105113997A (en) * | 2015-09-21 | 2015-12-02 | 武汉大学深圳研究院 | Drill maintenance method and device for ocean oil gas platform |
| CN115762843A (en) * | 2022-12-01 | 2023-03-07 | 杭州旷潼量子科技有限公司 | Be used for super cold atomic magnetic field precision control device |
-
1987
- 1987-08-07 JP JP19838687A patent/JPH0787368B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6441523A (en) | 1989-02-13 |
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