GB743255A - Improvements relating to circuits for deriving from amplitude modulated pulses sawtooth waveforms with proportionate durations - Google Patents
Improvements relating to circuits for deriving from amplitude modulated pulses sawtooth waveforms with proportionate durationsInfo
- Publication number
- GB743255A GB743255A GB30153/52A GB3015352A GB743255A GB 743255 A GB743255 A GB 743255A GB 30153/52 A GB30153/52 A GB 30153/52A GB 3015352 A GB3015352 A GB 3015352A GB 743255 A GB743255 A GB 743255A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diode
- capacitor
- pulses
- pulse
- discharge
- 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
- H03K7/00—Modulating pulses with a continuously-variable modulating signal
Landscapes
- Amplitude Modulation (AREA)
- Pulse Circuits (AREA)
Abstract
743,255. Pulse modulation circuits. TELEFUNKEN GES., [formerly TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE]. Nov. 28, 1952 [Nov. 28, 1951], No. 30153/52. Classes 40 (5) and 40 (6). In a saw-tooth wave generator for converting amplitude modulation pulses into saw-tooth waveforms of corresponding width, the short flank of the wave is generated by charging a capacitor through a unilateral conducting device in response to an input pulse and the long flank is generated by discharging the capacitor through a constant current source, the discharge being terminated before the potential across the capacitor reverses and thus before substantial curvature is exhibited. In Fig. 1 a capacitor Co is rapidly charged through a diode d1 by a positive pulse applied to input terminal 2 and slowly discharges through a constant current source S which maintains the discharge linear and which may comprise a voltage source and a high resistance or pentode valve. The discharge terminates when the capacitor voltage has fallen sufficiently for the diode d1 to become conductive since a diode d2 (or a small resistance) will clamp the anode of diode d1 to earth potential. The duration of the output wave depends upon the amplitude of the input pulse and by horizontally slicing the output wave a pulse whose width is modulated in accordance with the amplitude of the input pulse may be obtained. Phasemodulated pulses may be obtained by differentiation. In Fig. 3 negative input pulses charge the capacitor through a diode d1 and the capacitor discharges through a resistor R1 connected to a positive voltage the discharge continuing until grid current flows in the output amplifier valve T1. A diode d3 limits the maximum amplitude of the input pulses. The diode d2 of Fig. 1 is replaced by a resistor R. The circuit of Fig. 5 may also be arranged to receive positive pulses (Fig. 4, not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE743255X | 1951-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB743255A true GB743255A (en) | 1956-01-11 |
Family
ID=6646771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30153/52A Expired GB743255A (en) | 1951-11-28 | 1952-11-28 | Improvements relating to circuits for deriving from amplitude modulated pulses sawtooth waveforms with proportionate durations |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB743255A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1240122B (en) * | 1964-03-19 | 1967-05-11 | Siemens Ag Albis | Circuit arrangement for generating a series of pulses |
-
1952
- 1952-11-28 GB GB30153/52A patent/GB743255A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1240122B (en) * | 1964-03-19 | 1967-05-11 | Siemens Ag Albis | Circuit arrangement for generating a series of pulses |
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