GB1393767A - Oscillator circuits - Google Patents
Oscillator circuitsInfo
- Publication number
- GB1393767A GB1393767A GB3277972A GB3277972A GB1393767A GB 1393767 A GB1393767 A GB 1393767A GB 3277972 A GB3277972 A GB 3277972A GB 3277972 A GB3277972 A GB 3277972A GB 1393767 A GB1393767 A GB 1393767A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- capacitor
- input
- transistor
- derived
- 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
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/39—Organic or inorganic per-compounds
- C11D3/3902—Organic or inorganic per-compounds combined with specific additives
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
- G11C19/02—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements
- G11C19/08—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure
- G11C19/085—Generating magnetic fields therefor, e.g. uniform magnetic field for magnetic domain stabilisation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B27/00—Generation of oscillations providing a plurality of outputs of the same frequency but differing in phase, other than merely two anti-phase outputs
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
1393767 Keying oscillators; magnetic storage arrangements WESTERN ELECTRIC CO Inc 13 July 1972 [19 July 1971] 32779/72 Headings H3B and H3R An oscillator circuit includes a tuned circuit having a capacitor and at least one inductor, means for precharging the capacitor, switch means responsive to an energizing signal for completing a loop including the tuned circuit to initiate an oscillatory current therein, means for maintaining the oscillatory current at a predetermined value, and means connected across the switch means for terminating the oscillatory current at the end of an oscillation cycle upon removal of the energizing signal during a predetermined portion of the cycle. In a tuned circuit comprising capacitor 1, Fig. 1, main inductor 19 and auxiliary inductor 9, the capacitor 1 is held charged, in the static condition, by means of a current source comprising resistor 8. Upon an energizing signal e 1 being applied to its base, transistor 4 becomes conductive and closes the tuned circuit, which is then maintained in an oscillatory condition by means of amplifier 5, which derives an input from point 26 over 90 degrees phase-shifting circuit 11, and is biased from source E2 to provide class C operation. When the energizing signal e 1 is terminated oscillations cease; diode 3 connected in the reverse direction to the base-emitter junction of transistor 4 ensures that the oscillations terminate at the point in the cycle at which capacitor 1 is fully charged. Magnetic domain propagation circuit.-For use in such an arrangement, two of the abovedescribed circuits may be combined so as to provide a rotating magnetic field, the inductors 2, 2<SP>1</SP>, Fig. 2, of the two circuits 20, 30 being arranged mutually, perpendicular. The base of the transistor 4 is coupled directly to the control circuit 17, while the base of the transistor 4<SP>1</SP> is coupled thereto over a delay network 16. In addition, the device for the amplifier 5<SP>1</SP> is derived from the point 26 in the circuit 20, without interposition of a 90 degree phase-shifter. The control circuit 17 comprises a bi-stable circuit 27, the initiating control signal e 1 being applied to its "set" input S and also to AND gate 29 and OR gate 28. Switching off is determined by an input to the "reset" input R which is derived from AND gate 24, the two inputs to which are derived from input e 1 and a signal derived over diode 21 from the tuned circuit 1, 2: the latter ensures that switching off is performed in the correct part of the oscillation cycle. The Specification also describes a modification of this arrangement (Fig. 3, not shown) in which switches are provided whereby the direction of rotation of the magnetic field can be reversed.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16393871A | 1971-07-19 | 1971-07-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1393767A true GB1393767A (en) | 1975-05-14 |
Family
ID=22592275
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3277972A Expired GB1393767A (en) | 1971-07-19 | 1972-07-13 | Oscillator circuits |
Country Status (11)
Country | Link |
---|---|
US (1) | US3720883A (en) |
AU (1) | AU471931B2 (en) |
BE (1) | BE786392A (en) |
CA (1) | CA959575A (en) |
CH (1) | CH538752A (en) |
DE (1) | DE2234550A1 (en) |
FR (1) | FR2146357B1 (en) |
GB (1) | GB1393767A (en) |
IT (1) | IT964666B (en) |
NL (1) | NL7209154A (en) |
SE (1) | SE387493B (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7401844A (en) * | 1973-04-12 | 1974-10-15 | ||
JPS5092647A (en) * | 1973-12-14 | 1975-07-24 | ||
US3866145A (en) * | 1974-01-07 | 1975-02-11 | Bell Telephone Labor Inc | Tuned oscillator circuit for providing a rotating in-plane magnetic field |
LU70695A1 (en) * | 1974-03-27 | 1974-12-10 | ||
US3946373A (en) * | 1974-09-09 | 1976-03-23 | Gte Laboratories Incorporated | Control circuit for a rotating magnetic field of a bubble memory |
US3972037A (en) * | 1975-06-30 | 1976-07-27 | Bell Telephone Laboratories, Incorporated | Phase correcting drive circuit for a magnetic bubble field-access memory |
US4328525A (en) * | 1980-06-27 | 1982-05-04 | International Business Machines Corporation | Pulsed sine wave oscillating circuit arrangement |
JPS5856186B2 (en) * | 1980-09-19 | 1983-12-13 | 株式会社日立製作所 | Series resonant magnetic bubble drive circuit |
US4767999A (en) * | 1986-11-12 | 1988-08-30 | Megapulse, Inc. | Method of and apparatus for radio-frequency generation in resonator tank circuits excited by sequential pulses of alternately opposite polarity |
US4972438A (en) * | 1989-08-08 | 1990-11-20 | Siemens-Pacesetter, Inc. | Self-oscillating transmitter |
US6307468B1 (en) * | 1999-07-20 | 2001-10-23 | Avid Identification Systems, Inc. | Impedance matching network and multidimensional electromagnetic field coil for a transponder interrogator |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2411898A (en) * | 1944-04-21 | 1946-12-03 | Bell Telephone Labor Inc | Pulse generator |
US2671275A (en) * | 1949-03-31 | 1954-03-09 | Rca Corp | Magnetometer |
US3394321A (en) * | 1967-01-03 | 1968-07-23 | Gen Telephone & Elect | Square-wave oscillator with seriesresonant circuit |
-
1971
- 1971-07-19 US US00163938A patent/US3720883A/en not_active Expired - Lifetime
-
1972
- 1972-02-23 CA CA135,361A patent/CA959575A/en not_active Expired
- 1972-06-30 NL NL7209154A patent/NL7209154A/xx unknown
- 1972-07-10 SE SE7209093A patent/SE387493B/en unknown
- 1972-07-13 AU AU44552/72A patent/AU471931B2/en not_active Expired
- 1972-07-13 IT IT69273/72A patent/IT964666B/en active
- 1972-07-13 CH CH1054972A patent/CH538752A/en not_active IP Right Cessation
- 1972-07-13 GB GB3277972A patent/GB1393767A/en not_active Expired
- 1972-07-14 DE DE2234550A patent/DE2234550A1/en active Pending
- 1972-07-18 FR FR7225885A patent/FR2146357B1/fr not_active Expired
- 1972-07-18 BE BE786392A patent/BE786392A/en unknown
Also Published As
Publication number | Publication date |
---|---|
CA959575A (en) | 1974-12-17 |
CH538752A (en) | 1973-06-30 |
FR2146357B1 (en) | 1975-03-07 |
SE387493B (en) | 1976-09-06 |
US3720883A (en) | 1973-03-13 |
FR2146357A1 (en) | 1973-03-02 |
DE2234550A1 (en) | 1973-02-01 |
BE786392A (en) | 1972-11-16 |
IT964666B (en) | 1974-01-31 |
AU471931B2 (en) | 1976-05-06 |
NL7209154A (en) | 1973-01-23 |
AU4455272A (en) | 1974-01-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |