GB479732A - Improvements in electric relaxation oscillators - Google Patents
Improvements in electric relaxation oscillatorsInfo
- Publication number
- GB479732A GB479732A GB16244/37A GB1624437A GB479732A GB 479732 A GB479732 A GB 479732A GB 16244/37 A GB16244/37 A GB 16244/37A GB 1624437 A GB1624437 A GB 1624437A GB 479732 A GB479732 A GB 479732A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistance
- condenser
- tapping
- grid
- frequency
- 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
- H03K4/86—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements gas-filled tubes or spark-gaps
Landscapes
- Electrophonic Musical Instruments (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
479,732. Valve generating circuits. RADIOAKT.-GES. D. S. LOEWE. June 11, 1937, No. 16244. Convention date, June 20, 1936. [Class 40 (v)] The frequency of a relaxation oscillator is adjusted without varying the amplitude by variation of the resistance through which the condenser is charged. As shown, a potentiometer comprising resistances 7, 8, 5 is connected across the supply source 1. The condenser 3 is charged from a tapping on the resistance 7 through a resistance 2, the charging-current also flowing through the resistance 5. A further resistance 9 connects the tapping to the positive side of the source 1..The condenser 3 discharges through a gas-filled discharge tube 4 and a low resistance 6, the grid of the tube being biassed by the voltage across the resistance 5. Frequency is adjusted by moving the tapping on the resistance 7, and the connections are such that the current through the resistance 5 and therefore the bias on the grid of the tube 4 are substantially unaffected by the frequency adjustment. The oscillations may be fed to an amplifier 13 through a condenser 12 and a potential divider 15, 16 which applies only a small fraction of the available voltage to the grid. The fine frequency adjustment provided by the resistance 7 may be supplemented by a coarse adjustment in steps, by providing a number of condensers 3 and a number of resistances 9 with a multiple-contact switch for selecting one of each, Fig. 2 (not slown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE479732X | 1936-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB479732A true GB479732A (en) | 1938-02-10 |
Family
ID=6542451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16244/37A Expired GB479732A (en) | 1936-06-20 | 1937-06-11 | Improvements in electric relaxation oscillators |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2144779A (en) |
| FR (1) | FR823295A (en) |
| GB (1) | GB479732A (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2802179A (en) * | 1942-04-03 | 1957-08-06 | Itt | Indicating and calibrating means |
| US2425165A (en) * | 1943-05-15 | 1947-08-05 | Rca Corp | Stabilized harmonic oscillator |
| US2531830A (en) * | 1944-08-16 | 1950-11-28 | Albert R Simpson | Voltage pulse generator |
| US2582247A (en) * | 1945-10-16 | 1952-01-15 | Jr Hunter C Goodrich | Standard impulse noise generator |
| US2519413A (en) * | 1946-07-25 | 1950-08-22 | Albert H Taylor | Oscilloscope sweep circuit |
| GB536217A (en) * | 1946-09-25 | 1941-05-07 | Standard Telephones Cables Ltd | Improvements in or relating to time base circuits |
| US2640908A (en) * | 1947-11-07 | 1953-06-02 | United Shoe Machinery Corp | Machine for progressively bonding sheet material |
| US2768371A (en) * | 1955-06-09 | 1956-10-23 | Westinghouse Air Brake Co | Sound simulator for use in aircraft pilot trainers |
| US2947910A (en) * | 1957-02-21 | 1960-08-02 | Jr Francis H Shepard | Wide range electronic sweep circuit |
| US3227891A (en) * | 1959-09-30 | 1966-01-04 | North America Aviat Inc | Timing pulse generator |
| US3270323A (en) * | 1962-09-04 | 1966-08-30 | Ledex Inc | Control system for separate as well as simultaneous operation of remote working elements |
| US3465257A (en) * | 1966-05-31 | 1969-09-02 | Honeywell Inc | Function generating apparatus |
-
1937
- 1937-06-11 GB GB16244/37A patent/GB479732A/en not_active Expired
- 1937-06-11 US US147801A patent/US2144779A/en not_active Expired - Lifetime
- 1937-06-19 FR FR823295D patent/FR823295A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR823295A (en) | 1938-01-18 |
| US2144779A (en) | 1939-01-24 |
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