GB1498044A - Sawtooth signal generator - Google Patents
Sawtooth signal generatorInfo
- Publication number
- GB1498044A GB1498044A GB3018876A GB3018876A GB1498044A GB 1498044 A GB1498044 A GB 1498044A GB 3018876 A GB3018876 A GB 3018876A GB 3018876 A GB3018876 A GB 3018876A GB 1498044 A GB1498044 A GB 1498044A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sawtooth
- source
- voltage
- dwell time
- march
- 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
- H03K—PULSE TECHNIQUE
- H03K4/00—Generating pulses having essentially a finite slope or stepped portions
- H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
- H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
- H03K4/48—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices
- H03K4/50—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth voltage is produced across a capacitor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
- G11B15/43—Control or regulation of mechanical tension of record carrier, e.g. tape tension
Landscapes
- Control Of Direct Current Motors (AREA)
Abstract
1498044 Ramp generators RCA CORPORATION 13 March 1975 [14 March 1974 (2)] 30188/76 and 30189/76 Divided out of 1498043 Headings H3T and H4L A sawtooth generator, for use in controlling a tape system driven from an A.C. source, generates sawtooth pulses having a dwell time between pulses that is varied according to the line voltage of the A.C. source. The sawtooth is generated across a capacitor 71, Fig. 5, charged via transistor 73, starting a predetermined dwell time after each voltage zero of the A.C. source 66, and discharged by transistors 92, 94 in synchronism with the voltage zeros. The predetermined dwell time is set by R.C. circuit 77, 81 and modified by circuit 75 according to the charging of capacitor 89 i.e. to the amplitude of the rectified A.C. voltage. The A.C. source and sawtooth generated are shown in Fig. 6. Details of the use of such a sawtooth generator in a tape tension control system are also given, see parent Specification, Division G3.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3018876A GB1498044A (en) | 1975-03-13 | 1975-03-13 | Sawtooth signal generator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3018876A GB1498044A (en) | 1975-03-13 | 1975-03-13 | Sawtooth signal generator |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1498044A true GB1498044A (en) | 1978-01-18 |
Family
ID=10303676
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3018876A Expired GB1498044A (en) | 1975-03-13 | 1975-03-13 | Sawtooth signal generator |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1498044A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2503434A1 (en) * | 1981-04-06 | 1982-10-08 | Sony Corp | DEVICE FOR DRIVING A RIBBON, SUCH AS A DEVICE FOR DRIVING A MAGNETIC STRIP |
CN106452392A (en) * | 2016-10-14 | 2017-02-22 | 成都前锋电子仪器有限责任公司 | Sawtooth wave generating circuit |
-
1975
- 1975-03-13 GB GB3018876A patent/GB1498044A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2503434A1 (en) * | 1981-04-06 | 1982-10-08 | Sony Corp | DEVICE FOR DRIVING A RIBBON, SUCH AS A DEVICE FOR DRIVING A MAGNETIC STRIP |
CN106452392A (en) * | 2016-10-14 | 2017-02-22 | 成都前锋电子仪器有限责任公司 | Sawtooth wave generating circuit |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |