GB970320A - Improvements in or relating to saw-tooth waveform generators - Google Patents
Improvements in or relating to saw-tooth waveform generatorsInfo
- Publication number
- GB970320A GB970320A GB3723361A GB3723361A GB970320A GB 970320 A GB970320 A GB 970320A GB 3723361 A GB3723361 A GB 3723361A GB 3723361 A GB3723361 A GB 3723361A GB 970320 A GB970320 A GB 970320A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- capacitor
- resistor
- constant current
- positive feedback
- 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
Landscapes
- Details Of Television Scanning (AREA)
- Dc-Dc Converters (AREA)
Abstract
970,320. Transistor sawtooth circuits. MARCONI CO. Ltd. June 21, 1962 [Oct. 17, 1961], No. 37233/61. Heading H3T. A sawtooth generator comprises a capacitor charged via a constant current transistor and discharged via a further transistor, the linearity being controlled by positive feedback. As shown, capacitor 10 is charged via transistor 1 having a degenerative emitter resistor 5 so as to pass approximately constant current and periodically discharged by transistor 2. Positive feedback is taken from an adjustable resistor in the collector circuit of an emitter follower 3. The resistor may be adjusted to provide a linear waveform or one with an upward curvature at the output 13. The output impedance may be zero or even negative. A potential divider 18, 19, 20 is provided to ensure that sufficient charge is present in capacitor 10 at the beginning of each sweep for linear operation of transistor 3. Components 19, 20 may be replaced by a Zener or conventional diode (Fig. 5, not shown).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3723361A GB970320A (en) | 1961-10-17 | 1961-10-17 | Improvements in or relating to saw-tooth waveform generators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3723361A GB970320A (en) | 1961-10-17 | 1961-10-17 | Improvements in or relating to saw-tooth waveform generators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB970320A true GB970320A (en) | 1964-09-16 |
Family
ID=10394841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3723361A Expired GB970320A (en) | 1961-10-17 | 1961-10-17 | Improvements in or relating to saw-tooth waveform generators |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB970320A (en) |
-
1961
- 1961-10-17 GB GB3723361A patent/GB970320A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1139392A (en) | Improvements in and relating to an electrical circuit comprising a constant current pulse generating circuit | |
| GB935722A (en) | Improvements in or relating to time-base circuits employing transistors | |
| GB1425829A (en) | Vertical deflection circuit | |
| GB764590A (en) | Improvements relating to electronic sweep generating circuits | |
| GB970320A (en) | Improvements in or relating to saw-tooth waveform generators | |
| GB1179961A (en) | Television Deflection Circuit. | |
| GB1370851A (en) | Sine-cosine function generator | |
| GB1157725A (en) | Transistor Deflection Circuits for use with Cathode Ray Tubes | |
| GB1048213A (en) | Circuit arrangement for generating two-phase voltages | |
| GB995418A (en) | Improvements relating to circuits for generating sawtooth waveform currents | |
| GB1026137A (en) | Circuit arrangement for generating a sawtooth current in an inductive load | |
| GB682864A (en) | Improvements relating to circuits for generating sawtooth waveforms | |
| GB791454A (en) | Bipolar sawtooth generator | |
| GB972303A (en) | Multi-frequency frame scan generator for television apparatus | |
| GB1169542A (en) | Improvements in or relating to wave form generators | |
| GB932207A (en) | Improvements in or relating to saw-tooth wave generators | |
| GB720706A (en) | Electric wave generator circuits | |
| GB1100728A (en) | Deflection circuit arrangement for a television receiver | |
| GB1162816A (en) | Improvements in or relating to Transistor Scanning Circuits for Television Receivers | |
| ES357574A1 (en) | Transistor electrical circuit with collector voltage stabilization | |
| ES338441A1 (en) | Television deflection circuit with compensation for voltage supply variations | |
| JPS5664565A (en) | Vertical deflecting circuit | |
| GB746175A (en) | Improvements in or relating to line time base circuits particularly for television receivers | |
| GB962751A (en) | A saw-tooth generator | |
| GB931410A (en) | Improved waveform generator |