GB1122767A - Improvements in or relating to synchronising arrangements for free running oscillators - Google Patents
Improvements in or relating to synchronising arrangements for free running oscillatorsInfo
- Publication number
- GB1122767A GB1122767A GB3441767A GB3441767A GB1122767A GB 1122767 A GB1122767 A GB 1122767A GB 3441767 A GB3441767 A GB 3441767A GB 3441767 A GB3441767 A GB 3441767A GB 1122767 A GB1122767 A GB 1122767A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diode
- voltage
- generator
- sweep
- diodes
- 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
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
- H03L7/10—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range
- H03L7/12—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a scanning signal
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
1,122,767. Automatic phase control systems. TELEFUNKEN PATENTVERWERTUNGS G.m.b.H. 26 July, 1967 [11 Aug., 1966], No. 34417/67. Heading H3A. An automatic phase control system wherein a sweep generator 6 is initially coupled to control an oscillator 1 to bring it within the lock-in range of the control loop, is characterized in that the generator 6 is initially coupled through a switch 5 to the output of a phase discriminator 2 and control device 3 through one or more diodes 7. If the generator 6 starts at a low increasing voltage, the diode 7 conducts until the lock-in range is reached; at this point the output of the control device 3 rises suddenly to the required tuning voltage and reverse-biases the diode 7 which remains non-conducting until the output voltage of the generator 6 exceeds the tuning voltage by the voltage drop U D across the diode. This period of non-conduction of the diode allows time for a frequency-sensitive unit 4 to open the switch 5 and disconnect the sweep voltage. If the sweep operates in either direction a pair of parallel oppositely-poled diodes may be used. The value of U D may be increased by using a Zener diode or two oppositely poled Zener diodes in series.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1966T0031813 DE1266344B (en) | 1966-08-11 | 1966-08-11 | Arrangement for synchronizing a freely oscillating oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1122767A true GB1122767A (en) | 1968-08-07 |
Family
ID=7556572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3441767A Expired GB1122767A (en) | 1966-08-11 | 1967-07-26 | Improvements in or relating to synchronising arrangements for free running oscillators |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1266344B (en) |
| GB (1) | GB1122767A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3014923C2 (en) * | 1980-04-18 | 1983-10-20 | Rohde & Schwarz GmbH & Co KG, 8000 München | Circuit for increasing the capture range of a capture circuit for the control loop of a phase-controlled oscillator |
| JPH01196946A (en) * | 1988-02-01 | 1989-08-08 | Toshiba Corp | Frequency controller |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1075170B (en) * | 1960-02-11 | Siemens &. Halske Aktiengesellschaft, Berlin und München | Frequency locking circuit |
-
1966
- 1966-08-11 DE DE1966T0031813 patent/DE1266344B/en active Pending
-
1967
- 1967-07-26 GB GB3441767A patent/GB1122767A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1266344B (en) | 1968-04-18 |
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