JPS6076814A - Synthesizer type signal generator - Google Patents
Synthesizer type signal generatorInfo
- Publication number
- JPS6076814A JPS6076814A JP58184790A JP18479083A JPS6076814A JP S6076814 A JPS6076814 A JP S6076814A JP 58184790 A JP58184790 A JP 58184790A JP 18479083 A JP18479083 A JP 18479083A JP S6076814 A JPS6076814 A JP S6076814A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- signal generator
- controlled oscillator
- output
- synthesizer
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
- H03L7/093—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using special filtering or amplification characteristics in the loop
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明はシンセサイザ一方式信号発生器、特に自３ｉｂ
車電話用移動機のシンセサイザ一方式発生器に関する。[Detailed Description of the Invention] [Technical Field] The present invention relates to a synthesizer one-way signal generator, particularly a self-3ib signal generator.
This invention relates to a synthesizer one-way generator for a mobile phone.
第１図は従来例に係るシンセサイザ一方式信号発生器の
ブロック図であり、電圧制御発振器１、ローパスフィル
ター２、チャージポンプ３および位相検波器４により構
成されている。この動作の概要を説明すると、位相検波
器４とチャージポンプ３は基準信号Ａの周波数と、電圧
制御発振器１の出力周波数との位相差に比例したデジタ
ル的な電圧を出力する。ローパスフィルター２はこれを
連続的なアナログ電圧に変換して電圧制御発振器１に印
加し、電圧制御発振器１の出力信号Ｂの周波数を制御す
る。信号発生器は負のフィードバックループを形成して
いるので、出力周波数は所定の周波数に正確に設定され
る。FIG. 1 is a block diagram of a conventional synthesizer-type signal generator, which is composed of a voltage-controlled oscillator 1, a low-pass filter 2, a charge pump 3, and a phase detector 4. To summarize this operation, the phase detector 4 and the charge pump 3 output a digital voltage proportional to the phase difference between the frequency of the reference signal A and the output frequency of the voltage controlled oscillator 1. The low pass filter 2 converts this into a continuous analog voltage and applies it to the voltage controlled oscillator 1 to control the frequency of the output signal B of the voltage controlled oscillator 1. Since the signal generator forms a negative feedback loop, the output frequency is precisely set to a predetermined frequency.
ところでフィードバックループを形成してロックできる
電圧制御発振器１の入力電圧範囲は限られている。この
ため従来何らかの原因により、その範囲外の電圧が加わ
り、ループのロックがはずれる欠点があった。Incidentally, the input voltage range of the voltage controlled oscillator 1 in which a feedback loop can be formed and locked is limited. For this reason, conventionally there has been a drawback that for some reason a voltage outside the range is applied and the loop becomes unlocked.
本発明は上記の点に鑑み提案されたものであり、γＲ電
圧制御発振器コントロール入力側に電圧範囲限定回路を
備えた信号発生器の提供を目的とする。The present invention has been proposed in view of the above points, and an object of the present invention is to provide a signal generator equipped with a voltage range limiting circuit on the control input side of a γR voltage controlled oscillator.
本発明は第１の基準電圧とこの電圧より低い第２の基準
電圧とを発生する電圧分圧回路と、前記ローパスフィル
ターの出力電圧が第１の基準電圧より高いどき第１の基
準電圧（−限定して前記電圧制御発振器に入力し、前記
ローパスフィルターの出力電圧が第２の基準電圧より低
いとき第２の基準電圧に限定して前Ｒｅ電圧制御発振器
入力する電圧リミット回路とによって構成される電圧範
囲限定回路を有することを特徴とする。The present invention includes a voltage divider circuit that generates a first reference voltage and a second reference voltage lower than this voltage, and a first reference voltage (-) when the output voltage of the low-pass filter is higher than the first reference voltage. and a voltage limit circuit that limits the voltage to the second reference voltage and inputs it to the voltage controlled oscillator when the output voltage of the low-pass filter is lower than the second reference voltage. It is characterized by having a voltage range limiting circuit.
本発明の実施例の′４皆成について、図面を参照し７Ｋ
から説明する。第２図は本発明の実施例に係るシンセサ
イザ一方式信号発生器の一部回路図を含むブロック図で
ある。図において同じ符番は第１図（二示すものと共通
のものである。7K with reference to the drawings for all '4 configurations of the embodiments of the present invention.
I will explain from. FIG. 2 is a block diagram including a partial circuit diagram of a synthesizer one-way signal generator according to an embodiment of the present invention. The same reference numerals in the figures are the same as those shown in Figures 1 and 2.
７は実施例（＝係る電圧範囲限定回路であり、ローパス
フィルター２の出力と電圧制御発振器１の入力との間に
挿入されている。電圧範囲限定回路Ｉは分圧抵抗９ 、
１０ 、１１とダイオード１２，１３ｊＨよび抵抗値の
大さい抵抗８によって構成されている。7 is the voltage range limiting circuit according to the embodiment, and is inserted between the output of the low-pass filter 2 and the input of the voltage controlled oscillator 1.The voltage range limiting circuit I includes a voltage dividing resistor 9,
10 and 11, diodes 12 and 13jH, and a resistor 8 with a large resistance value.
またｖｌはローパスフィルター２の出力′磁圧、ｖ２は
抵抗９と抵抗１０の接続点での゛磁圧、鴇は抵抗１０と
抵抗１１の接続点での電圧を示す。尚、抵抗８の抵抗値
の大きさは７１点から電源側をみた等価抵抗値および７
１点から電源側をみた等価抵抗値と次のよう７′ｌ：関
係がある。Further, vl indicates the output magnetic pressure of the low-pass filter 2, v2 indicates the magnetic pressure at the connection point between the resistors 9 and 10, and 鈥收 indicates the voltage at the connection point between the resistors 10 and 11. The resistance value of resistor 8 is the equivalent resistance value when looking at the power supply side from 71 points and 7
There is a relationship between the equivalent resistance value when looking at the power supply side from one point as follows.
抵抗８〉７７点から電源側をみた等価抵抗値抵抗８＞■
；点から電源側をみた等価抵抗値。Resistance 8>Equivalent resistance value when looking at the power supply side from 77 pointsResistance 8>■
;Equivalent resistance value when looking at the power supply side from the point.
また、電圧制御発振器１のロック可能のコントロール電
圧の上限および下限電圧をそれぞれＶ＋ｒｇ。Further, the upper and lower limit voltages of the lockable control voltage of the voltage controlled oscillator 1 are respectively V+rg.
Ｖ−ｉｎおよびダイオードの順方向電圧をＶｆとし、分
圧値Ｖ７．Ｖ、は
Ｖ、＝Ｖ彼−Ｖｆ
Ｖｓ ＝ｖ＝ ＋ Ｖｆ
のよう（＝設定する。Let V-in and the forward voltage of the diode be Vf, and the divided voltage value V7. V, is set as V, = Vhe - Vf Vs = v = + Vf.
次に本発明に係るシンセサイザ一方式信号発生器の動作
を第３図の動作説明図を用いて説明する。Next, the operation of the synthesizer one-type signal generator according to the present invention will be explained using the operation explanatory diagram of FIG.
ローパスフィルター２の出力電圧ｖ１カ■りＶｌ＜Ｖ：
式ノドきＶ、−Ｖｆ＜Ｖ、 ＜Ｖ、 ＋Ｖｆテあるから
、ダイオード１２．１３には電流が流れず、電圧Ｖ、は
そのまま電圧制御発振器１に印加し、ロック状態Ｉユ移
行しうる（第３図（Ａ）参照）。Output voltage of low-pass filter 2 v1 = Vl<V:
Since the equations V, -Vf<V, <V, +Vf exist, no current flows through the diodes 12 and 13, and the voltage V is directly applied to the voltage controlled oscillator 1, allowing it to transition to the locked state ( (See Figure 3(A)).
何らかの要因でローパスフィルター２の出力電圧Ｖ、が
ｖ１≧Ｖｒａ即ちＶ１≧Ｖ、 ＋ Ｖｆとなると電源側
へ電流が流出するが（第３図（Ｂ）参照）、抵抗８の値
が大きいので電流Ｃ二よる電圧降下は、はとんど抵抗８
の両端で消費され、従ってＶ２の電圧レベルはほとんど
上昇しない。このためＶ４は設定電圧ｖ２＋ｖｆ＝ｖｍ
に抑えられるのでロック状態からはずれることはない。If for some reason the output voltage V of the low-pass filter 2 becomes v1≧Vra, that is, V1≧V, +Vf, a current flows to the power supply side (see Figure 3 (B)), but since the value of the resistor 8 is large, the current The voltage drop due to C2 is almost the same as resistance 8.
is consumed across V2, so the voltage level of V2 hardly increases. Therefore, V4 is the set voltage v2 + vf = vm
Since it can be suppressed to
また何らかの架内でローパスフィルター２の出力’ｉｈ
： ＩＥ Ｖ＋ カＶ１≦Ｖ＝即ちＶ、 ＜Ｖｌ−Ｖ７
トｆｘ ル、！ｌ：電源側から電流が流入するが（第
３図（Ｃ）参照）、この」、す合も電流による電圧降下
はほとんど抵抗８の両郊１で消費され、従ってＶ９の電
圧レベルはほとんど低下しｌい。このためｖ４は設定電
圧Ｖ、−ｖｆ＝Ｖ鱈で抑えられるのでロック状態からは
ずれることはない。In addition, the output of low-pass filter 2 'ih
: IE V+ V1≦V=i.e., V, <Vl-V7
Tofx le! l: Current flows in from the power supply side (see Figure 3 (C)), but in this case, most of the voltage drop due to the current is consumed on both sides of resistor 8, and therefore the voltage level of V9 almost decreases. It's quiet. Therefore, v4 is suppressed by the set voltage V, -vf=V, so that it does not go out of the locked state.
以上説明したように本発明に係るシンセサイザ一方式信
号発生器によれば、ロック可能範囲外の電圧が電圧制御
発振器に入力したときもロック可能範囲レベル（二設定
するので安定した動作を得ることができる。As explained above, according to the synthesizer one-type signal generator according to the present invention, stable operation can be obtained even when a voltage outside the lockable range is input to the voltage controlled oscillator because the lockable range level (2) is set. can.
第１図は従来例に係るシンセサイザ一方式信号発生器の
ブロック図、第２図は本発明の実施例に係るシンセサイ
ザ一方式信号発生器の一部回路図を含むブロック図、第
３図は本発明の実施例に係るシンセサイザ一方式信号発
生器の動作説明図である。
１・・・電圧制御発振器 ２・・・ローパスフィルター
３・・・チャージポンプ ４・・・位相検波器７・・・
電圧範囲限定回路 ８〜１１・・・抵抗１２．１３・・
・ダイオードFIG. 1 is a block diagram of a conventional synthesizer one-way signal generator, FIG. 2 is a block diagram including a partial circuit diagram of a synthesizer one-way signal generator according to an embodiment of the present invention, and FIG. 3 is a block diagram of a synthesizer one-way signal generator according to an embodiment of the present invention. FIG. 2 is an explanatory diagram of the operation of the synthesizer one-type signal generator according to the embodiment of the invention. 1... Voltage controlled oscillator 2... Low pass filter 3... Charge pump 4... Phase detector 7...
Voltage range limited circuit 8 to 11...Resistance 12.13...
·diode
Claims (1)
サイザ一方式信号発生器において、第１の基準電圧とこ
の電圧より低い第２の基準電圧とを発生する電圧分圧回
路と、 前記ローパスフィルターの出力電圧が第１の基準電圧よ
り高いとき第１の基準電圧に限定して前記電圧制御発振
器（二人力し、剪定ローパスフィルターの出力電圧が第
２の基準電圧より低いとき第２の基準電圧に限定して前
記電圧制御発振器入力する電圧リミット回路とによって
構成される電圧範囲限定回路を有することを特徴とする
ミスロック防止機能付きのシンセサイザ一方式信号発生
器。[Scope of Claims] A synthesizer-type signal generator equipped with a low-pass filter and a voltage-controlled oscillator, comprising: a voltage divider circuit that generates a first reference voltage and a second reference voltage lower than the first reference voltage; When the output voltage of the low-pass filter is higher than the first reference voltage, the voltage controlled oscillator (two people) is limited to the first reference voltage, and when the output voltage of the pruning low-pass filter is lower than the second reference voltage, the second 1. A synthesizer one-type signal generator with a mislock prevention function, comprising a voltage range limiting circuit that inputs only a reference voltage to the voltage controlled oscillator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58184790A JPS6076814A (en) | 1983-10-03 | 1983-10-03 | Synthesizer type signal generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58184790A JPS6076814A (en) | 1983-10-03 | 1983-10-03 | Synthesizer type signal generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6076814A true JPS6076814A (en) | 1985-05-01 |
Family
ID=16159334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58184790A Pending JPS6076814A (en) | 1983-10-03 | 1983-10-03 | Synthesizer type signal generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6076814A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50105364A (en) * | 1974-01-28 | 1975-08-20 |
-
1983
- 1983-10-03 JP JP58184790A patent/JPS6076814A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50105364A (en) * | 1974-01-28 | 1975-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS621322A (en) | Frequency synthesizer | |
| JPS6076814A (en) | Synthesizer type signal generator | |
| JP2508180Y2 (en) | Direct modulation PLL circuit | |
| JP3070076B2 (en) | Phase-locked oscillation circuit | |
| JP3343918B2 (en) | Divider | |
| JPH0328606Y2 (en) | ||
| JPH0631784Y2 (en) | PLL circuit | |
| JPS6333383Y2 (en) | ||
| JPH01190126A (en) | Phase locked loop circuit | |
| JPS6441523A (en) | External control type atomic oscillator | |
| JPH0481127A (en) | Phase locked loop circuit | |
| JPH0537370A (en) | Frequency synthesizer | |
| JPH071855Y2 (en) | Double balance mixer | |
| JP2768013B2 (en) | Divider | |
| JPH01319309A (en) | Amplitude modulation circuit | |
| JPS6253961B2 (en) | ||
| JPS59140541U (en) | PLL synthesizer | |
| JPS5923188B2 (en) | switching regulator | |
| JPS62290214A (en) | Phase locked oscillator | |
| JPH04117729A (en) | Oscillation circuit | |
| JPS62159558A (en) | Frequency modulator | |
| JPH0239892B2 (en) | ||
| JPS61158213A (en) | Phase comparator | |
| JPH04183118A (en) | Pll circuit | |
| JPH02125529A (en) | Pll circuit |