IL40265A - Oscillator phase-control circuits - Google Patents
Oscillator phase-control circuitsInfo
- Publication number
- IL40265A IL40265A IL40265A IL4026572A IL40265A IL 40265 A IL40265 A IL 40265A IL 40265 A IL40265 A IL 40265A IL 4026572 A IL4026572 A IL 4026572A IL 40265 A IL40265 A IL 40265A
- Authority
- IL
- Israel
- Prior art keywords
- transistor
- collector
- diodes
- stage
- oscillator
- Prior art date
Links
- 230000010355 oscillation Effects 0.000 claims abstract 8
- 230000001427 coherent effect Effects 0.000 claims 1
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
- G01S13/585—Velocity or trajectory determination systems; Sense-of-movement determination systems processing the video signal in order to evaluate or display the velocity value
- G01S13/586—Velocity or trajectory determination systems; Sense-of-movement determination systems processing the video signal in order to evaluate or display the velocity value using, or combined with, frequency tracking means
-
- 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
- H03L7/24—Automatic control of frequency or phase; Synchronisation using a reference signal directly applied to the generator
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Amplifiers (AREA)
Abstract
1328327 Transistor oscillator circuits; keying circuits; pulse radar SIEMENS-ALBIS AG 9 Aug 1972 [10 Sept 1971] 37135/72 Headings H3R H3T and H4D An oscillator circuit providing phase-control of oscillations relative to a synchronizing oscillation, comprises a first amplifier stage 1 in the form of an emitter-follower whose output is connected to the imput of a second amplifier stage 2 in the form of a common-base stage, the output of which is connected to the input of the first amplifier via a frequency-selective positive feedback path 6. The output of the first amplifier stage 1 is connected to the input of the second amplifier stage 2 via a transient-free switching and amplitude-limiting stage 3 keyed by a control voltage, while the input of the second amplifier stage 2 is connected via an isolating resistor 21 to an input terminal UT for the synchronizing oscillation. In the embodiment, the switching and amplitude-limiting stage 3 comprises series-connected and reversely poled diodes 33, 35, together with a differential amplifier comprising transistors 47, 48 having the emitter-collector path of a further transistor 49 as common emitter impedance. Normally, transistor 47 is cut off and transistor 48, so that diodes 33, 35 which are biased from the collector circuits of these transistors via impedances 37, 39 which may be resistors or inductors, and terminal 34, are conductive. A positive-going pulse (US, Fig. 3, not shown) on terminal US biases transistor 47 conductive, so that transistor 48 becomes non-conductive, and the diodes 37, 39 become non-conductive, breaking the feedback path of the oscillator. The impedances 37, 39 may comprise the collector to emitter paths of a pair of transistors, provided with suitable base bias and with their emitters connected together and to the collector of transistor 47 (Fig. 2, not shown). The arrangement may be used in pulseoperated Doppler radar devices in which the phase of the echo pulses must be compared with that of the original transmitted pulse oscillations, and it is necessary for phase information regarding the transmitted signal to be stored until the time of the echo reception.
[GB1328327A]
Claims (3)
1. Oscillator for generating trains of oscillations wherei.-.:. the oscillations are coherent to a locking signal consisting of a train of oscillations, first and second transistorized amplifying stages are present which are coupled by a frequency- selective positive feedback path, via a parallel resonant circuit from the output of the second amplifying stage to the input of the first amplifying stage, an amplitude limiting circuit based on a pair of diodes is placed between the two amplifying stages, the in-put of the second stage ist connected via a resistance to the locking signal input, the second amplifier is operated in the common base mode and provided with a switching stage for interrupting the oscillations prior to the introduction of the locking signal pulse, characterised thereby that the first amplifying stage (1) operates as an emitter follower, that the amplitude limiting circuit operates as a transient- free switching stage (3) containing a pair of diodes (33, 35) connected back-to-back in series as an a.c. path, a constant switching current flowing in the forward direction through the diodes when the oscillator is in the operating mode, the said current being taken from each of the diodes via a decoupling impedance when the oscillator is in non-operative condition.
2. Oscillator as claimed in Claim 1, characterised thereby that each of the two diodes (33, 35) between the two junctions (30, 31) and the amplifier stages (1, 2) is on the one hand grounded via resistance (32, 36) and on the other hand connected via a decoupli impedance (37 > 39) to the collector of the first transistor (47) 407. c> 5 in the switched differential amplifier (4), the junction (34) between the two diodes (33, 35) being joined to the collector of the second transistor (48) of the differential amplifier (4) and the emitter of the transistors of the differential amplifier being connected to the collector of a transistor (49) wired as a current source.
3. Oscillator as claimed in Claim 2, characterised thereby that the coupling impedance (37, 39) consists of the emitter-collector sections of two transistors (51, 52) whose emitters are connected to the collector of the first transistor (4) in the switched differential amplifier (4) with a bias voltag applied to their bases. Attorneys for Applicant
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1326771A CH528840A (en) | 1971-09-10 | 1971-09-10 | Oscillator for generating oscillation pulses with a coherent phase with respect to a synchronization oscillation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IL40265A0 IL40265A0 (en) | 1972-12-29 |
| IL40265A true IL40265A (en) | 1976-08-31 |
Family
ID=4390901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL40265A IL40265A (en) | 1971-09-10 | 1972-08-31 | Oscillator phase-control circuits |
Country Status (15)
| Country | Link |
|---|---|
| JP (1) | JPS5214067B2 (en) |
| AT (1) | AT331857B (en) |
| BE (1) | BE788580A (en) |
| CH (1) | CH528840A (en) |
| DK (1) | DK136289B (en) |
| ES (1) | ES406486A1 (en) |
| FR (1) | FR2151988A5 (en) |
| GB (1) | GB1328327A (en) |
| IL (1) | IL40265A (en) |
| IT (1) | IT967263B (en) |
| LU (1) | LU66031A1 (en) |
| NL (1) | NL149605B (en) |
| NO (1) | NO131655C (en) |
| SE (1) | SE373709B (en) |
| ZA (1) | ZA725887B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018108441A1 (en) * | 2018-04-10 | 2019-10-10 | Schaeffler Technologies AG & Co. KG | Torsional vibration damper, clutch disc and clutch |
| KR102659944B1 (en) * | 2022-03-11 | 2024-04-24 | 한국전력공사 | Apparatus and method for measuring moisture in oil, and method for detecting moisture concentration in oil |
-
0
- BE BE788580D patent/BE788580A/en unknown
-
1971
- 1971-09-10 CH CH1326771A patent/CH528840A/en not_active IP Right Cessation
-
1972
- 1972-08-09 GB GB3713572A patent/GB1328327A/en not_active Expired
- 1972-08-14 AT AT703172A patent/AT331857B/en not_active IP Right Cessation
- 1972-08-28 ZA ZA725887A patent/ZA725887B/en unknown
- 1972-08-28 NO NO3052/72A patent/NO131655C/no unknown
- 1972-08-29 FR FR7230632A patent/FR2151988A5/fr not_active Expired
- 1972-08-31 IL IL40265A patent/IL40265A/en unknown
- 1972-09-06 NL NL727212138A patent/NL149605B/en not_active IP Right Cessation
- 1972-09-07 SE SE7211550A patent/SE373709B/en unknown
- 1972-09-07 DK DK440772AA patent/DK136289B/en unknown
- 1972-09-08 ES ES406486A patent/ES406486A1/en not_active Expired
- 1972-09-08 IT IT28953/72A patent/IT967263B/en active
- 1972-09-08 LU LU66031A patent/LU66031A1/xx unknown
- 1972-09-11 JP JP47091141A patent/JPS5214067B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5214067B2 (en) | 1977-04-19 |
| FR2151988A5 (en) | 1973-04-20 |
| SE373709B (en) | 1975-02-10 |
| NL149605B (en) | 1976-05-17 |
| ATA703172A (en) | 1975-12-15 |
| DK136289B (en) | 1977-09-19 |
| BE788580A (en) | 1973-01-02 |
| NO131655B (en) | 1975-03-24 |
| IL40265A0 (en) | 1972-12-29 |
| IT967263B (en) | 1974-02-28 |
| DK136289C (en) | 1978-02-20 |
| GB1328327A (en) | 1973-08-30 |
| NO131655C (en) | 1975-07-02 |
| AT331857B (en) | 1976-08-25 |
| CH528840A (en) | 1972-09-30 |
| JPS4838658A (en) | 1973-06-07 |
| ZA725887B (en) | 1973-05-30 |
| LU66031A1 (en) | 1973-01-17 |
| NL7212138A (en) | 1973-03-13 |
| ES406486A1 (en) | 1975-09-16 |
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