GB622763A - Improvements in or relating to push-pull mixing circuits - Google Patents
Improvements in or relating to push-pull mixing circuitsInfo
- Publication number
- GB622763A GB622763A GB8633/47A GB863347A GB622763A GB 622763 A GB622763 A GB 622763A GB 8633/47 A GB8633/47 A GB 8633/47A GB 863347 A GB863347 A GB 863347A GB 622763 A GB622763 A GB 622763A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anodes
- impedance
- over
- local oscillations
- rectifiers
- 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
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/14—Balanced arrangements
- H03D7/1416—Balanced arrangements with discharge tubes having more than two electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Superheterodyne Receivers (AREA)
Abstract
622,763. Superheterodyne circuits. PHILIPS LAMPS, Ltd. March 31, 1947, No. 8633. Convention date, July 26, 1944. [Classes 40 (v) and 40 (vi)] [Also in Group XL (b)] In a superheterodyne mixing circuit in which signals are applied in push-pull to a pair of rectifiers over a Lecher wire system 2<1>, 2<11>, Fig. 1, local oscillations are applied in parallel by means of a coupling inductance 5 and condensers 6<1>, 6<11> in order to prevent radiation. The Lecher wires are earthed by a shorting bridge 4 at the remote end, the potential at the aerial due to local oscillations being reduced by connection of the cathodes of the rectifiers to earth over a high impedance 7 such as a choke. Radiation may be further reduced by earthing the inductance 5 at a tap having the same potential for local oscillations as the rectifier anodes. The choke 7 may then be omitted. The arrangement may be modified to comprise a pair of inductances each coupling the local oscillator to one of the rectifiers, in place of the inductance 5. The mixing valves may be triodes, the local oscillations being self-generated by utilizing the inter-electrode capacities and back-coupling the grids and anodes over inductances 9<1>, 9<11>, condensers 10<1>, 10<11>, and a common impedance 11. A path of high impedance is provided from the anodes to earth by high-frequency chokes 7<1>, 7<11>, over which the intermediate-frequency output is taken. Radiation may be further reduced by earthing a tap on the impedance 11 or by means of an artificial tap comprising condensers connected between earth and the respective grids and anodes (Fig. 3, not shown). The impedance 11 may be a cavity resonator for stabilizing the oscillator frequency (see Group XL (b)).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL622763X | 1944-07-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB622763A true GB622763A (en) | 1949-05-06 |
Family
ID=19788475
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8633/47A Expired GB622763A (en) | 1944-07-26 | 1947-03-31 | Improvements in or relating to push-pull mixing circuits |
Country Status (4)
Country | Link |
---|---|
US (1) | US2554107A (en) |
DE (1) | DE829604C (en) |
FR (1) | FR937998A (en) |
GB (1) | GB622763A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2753457A (en) * | 1952-03-18 | 1956-07-03 | Zenith Radio Corp | Frequency-selective electrical network |
US5465418A (en) * | 1993-04-29 | 1995-11-07 | Drexel University | Self-oscillating mixer circuits and methods therefor |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1978446A (en) * | 1930-05-13 | 1934-10-30 | Csf | Heterodyne system |
BE387351A (en) * | 1931-03-23 | |||
US2101438A (en) * | 1935-02-27 | 1937-12-07 | Rca Corp | Neutralized coupling circuit |
GB507495A (en) * | 1936-12-21 | 1939-06-15 | Loewe Opta Gmbh | Improvements in oscillatory circuit arrangements for modulated ultra-short waves |
BE432342A (en) * | 1938-01-29 | |||
GB544675A (en) * | 1940-09-21 | 1942-04-23 | Du Pont | Improvements in or relating to the prevention of caking or setting of ammonium nitrate or ammonium nitrate compositions |
BE443633A (en) * | 1940-12-05 | |||
US2434474A (en) * | 1941-01-28 | 1948-01-13 | Hartford Nat Bank & Trust Co | Circuit arrangement for ultra short waves |
BE444311A (en) * | 1941-01-31 |
-
0
- FR FR937998D patent/FR937998A/fr not_active Expired
-
1947
- 1947-02-12 US US728134A patent/US2554107A/en not_active Expired - Lifetime
- 1947-03-31 GB GB8633/47A patent/GB622763A/en not_active Expired
-
1948
- 1948-11-05 DE DEP20706D patent/DE829604C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2554107A (en) | 1951-05-22 |
FR937998A (en) | 1948-10-12 |
DE829604C (en) | 1952-01-28 |
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