GB635643A - Improvements relating to electronic control apparatus - Google Patents
Improvements relating to electronic control apparatusInfo
- Publication number
- GB635643A GB635643A GB3119547A GB3119547A GB635643A GB 635643 A GB635643 A GB 635643A GB 3119547 A GB3119547 A GB 3119547A GB 3119547 A GB3119547 A GB 3119547A GB 635643 A GB635643 A GB 635643A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- sawtooth waveform
- valve
- condenser
- peak
- 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
- H03K4/52—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 using two semiconductor devices so coupled that the input of each one is derived from the output of the other, e.g. multivibrator
Landscapes
- Generation Of Surge Voltage And Current (AREA)
Abstract
635,643. Peak voltage measurements. SCOLES, G. J., and METROPOLITAN. VICKERS ELECTRICAL CO., Ltd. Nov. 25, 1947, No. 31195. [Class 37] Means for producing a voltage corresponding to the peak voltage of a sawtooth waveform comprise a storage condenser connected in series with a charging thermionic valve, and in parallel with a discharging valve, both valves being rendered conducting during peak voltage periods, the receiving sawtooth waveform also controlling the charging of a buffer condenser with slow or interrupted discharge means, so that the voltage across the buffer condenser, which controls the charging valve, does not fall appreciably during the fly-back period. In Fig. 1, the sawtooth waveform is applied to valve V<4> which has a long time constant circuit C2, R3 connected to its cathode, so that the output from the cathode consists of a modified sawtooth waveform in which any steep fall in voltage is eliminated. The cathode output is applied to valve V5 so that condenser C3 charges up to the peak value of the sawtooth waveform. Synchronizing pulses are applied to valve V7 to provide discharge impulses for condenser C3 at periods corresponding to the sawtooth waveform peaks.- The arrangement is such that the voltage across condenser C3 then follows variations in the peak levels of the sawtooth waveform. This voltage may be used in strobing apparatus to vary the operational voltage according to the peak amplitude of a sawtooth waveform, so that strobing occurs at a fixed relative position along the timebase. In an alternative arrangement, a discharge valve is connected in place of resistance R3, which is rendered conducting by pulses which occur during the forward stroke of the sawtooth waveform so that the voltage applied to the grid of valve 5 is maintained constant during the first portion of the fly-back period at a level corresponding to the peak amplitude of the sawtooth waveform. This eliminates the small fluctuations in the voltage across condenser 3. Specification 621,752 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3119547A GB635643A (en) | 1947-11-25 | 1947-11-25 | Improvements relating to electronic control apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3119547A GB635643A (en) | 1947-11-25 | 1947-11-25 | Improvements relating to electronic control apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB635643A true GB635643A (en) | 1950-04-12 |
Family
ID=10319423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3119547A Expired GB635643A (en) | 1947-11-25 | 1947-11-25 | Improvements relating to electronic control apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB635643A (en) |
-
1947
- 1947-11-25 GB GB3119547A patent/GB635643A/en not_active Expired
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