JPS56104544A - Frequency compounding device - Google Patents
Frequency compounding deviceInfo
- Publication number
- JPS56104544A JPS56104544A JP646480A JP646480A JPS56104544A JP S56104544 A JPS56104544 A JP S56104544A JP 646480 A JP646480 A JP 646480A JP 646480 A JP646480 A JP 646480A JP S56104544 A JPS56104544 A JP S56104544A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- signal
- output
- error signal
- oscillator
- 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
- 238000013329 compounding Methods 0.000 title abstract 2
- 239000003990 capacitor Substances 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 abstract 1
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
- H03L7/10—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range
- H03L7/107—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a variable transfer function for the loop, e.g. low pass filter having a variable bandwidth
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
PURPOSE:To maintain a high-speed frequency switching response and to ensure a stable working in the steady state through lowering the feedback gain, by inserting a simple variable gain circuit into the frequency compounding device to secure a high feedback gain under the nonphase synchronous state. CONSTITUTION:The frequency phase comparator 2 compares both the frequency and the phase between the reference signal fR supplied from the reference frequency oscillator 1 and the output signal obtained by giving a step-down to the output frequency of fO of voltage controlling oscillator 4 through the variable frequency step- down device 5. Thus an error signal is obtained to be supplied to next variable gain device 6. In case the pulse of the error signal in the device 6 has a wide waveform, the higher harmonic component is excluded through a low pass filter of the resistance 7 and capacitor 8 to obtain a signal having a reduced distortion. This signal is transmitted to the output via a diode, while the signal having a small duration has a reduced waveform amplitude and does not pass through the diode to be delivered via the resistance 11. Thus the voltage control oscillator 4 is controlled by the output of the device 6 via the low pass filter 3. When the error signal has a large pulse duration due to a switching of frequency or the like, the feedback gain is increased to accelerate the response speed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP646480A JPS56104544A (en) | 1980-01-23 | 1980-01-23 | Frequency compounding device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP646480A JPS56104544A (en) | 1980-01-23 | 1980-01-23 | Frequency compounding device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56104544A true JPS56104544A (en) | 1981-08-20 |
Family
ID=11639161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP646480A Pending JPS56104544A (en) | 1980-01-23 | 1980-01-23 | Frequency compounding device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56104544A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999063670A1 (en) * | 1998-06-04 | 1999-12-09 | Adc Telecommunications, Inc. | Phase-locked loop with a loop filter |
-
1980
- 1980-01-23 JP JP646480A patent/JPS56104544A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999063670A1 (en) * | 1998-06-04 | 1999-12-09 | Adc Telecommunications, Inc. | Phase-locked loop with a loop filter |
US6064273A (en) * | 1998-06-04 | 2000-05-16 | Adc Telecommunications | Phase-locked loop having filter with wide and narrow bandwidth modes |
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