GB623162A - Improvements in or relating to superheterodyne mixing circuits - Google Patents
Improvements in or relating to superheterodyne mixing circuitsInfo
- Publication number
- GB623162A GB623162A GB10869/47A GB1086947A GB623162A GB 623162 A GB623162 A GB 623162A GB 10869/47 A GB10869/47 A GB 10869/47A GB 1086947 A GB1086947 A GB 1086947A GB 623162 A GB623162 A GB 623162A
- Authority
- GB
- United Kingdom
- Prior art keywords
- condenser
- grid
- neutralized
- screen
- series
- 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
- H03D7/06—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes
- H03D7/10—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes the signals to be mixed being applied between different pairs of electrodes
-
- 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
- H03D7/06—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Induction Heating (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
623,162. Superheterodyne circuits. PHILIPS LAMPS, Ltd. April 23, 1947, No. 10869. Convention date, Nov. 3, 1944. [Class 40 (v)] In a frequency-changing valve of the type in which signals are applied to an outer and local oscillations to an inner grid and in which transmission from inner to outer grid by the induction effect is neutralized by means of an external condenser 14 coupling the two grids, transfer of signal energy to the inner grid over this condenser is neutralized by the connection of a further condenser 17 between the outer screen and inner grid. Resistances may be connected in series or shunt with the condensers 14, 17, in order to compensate for transit-time effects. A blocking impedance 16 is placed in series with the screen lead and may comprise a resistance, or alternatively and to prevent the introduction of feedback at oscillator and intermediate frequencies, a circuit tuned to the signal frequency. The condenser 17 may be replaced or supplemented by an inductive coupling between the outer screen and oscillator anode 4.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE261237X | 1944-11-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB623162A true GB623162A (en) | 1949-05-12 |
Family
ID=3866751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10869/47A Expired GB623162A (en) | 1944-11-03 | 1947-04-23 | Improvements in or relating to superheterodyne mixing circuits |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2577489A (en) |
| CH (1) | CH261237A (en) |
| DE (1) | DE807629C (en) |
| FR (1) | FR936844A (en) |
| GB (1) | GB623162A (en) |
| NL (1) | NL66625C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE497412A (en) * | 1949-08-09 | |||
| US2833990A (en) * | 1955-11-21 | 1958-05-06 | Collins Radio Co | Controlled oscillator means utilizing gated-beam tubes |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE401193A (en) * | 1933-01-31 | |||
| US2033986A (en) * | 1933-12-08 | 1936-03-17 | Rca Corp | Frequency converter |
| NL46575C (en) * | 1935-01-31 | |||
| US2122283A (en) * | 1937-03-09 | 1938-06-28 | Rca Corp | Frequency converter |
| US2141750A (en) * | 1937-06-19 | 1938-12-27 | Rca Corp | Frequency converter |
| US2252584A (en) * | 1939-05-09 | 1941-08-12 | Philips Nv | Mixing circuit in superheterodyne receivers |
| GB547737A (en) * | 1941-02-07 | 1942-09-09 | Standard Telephones Cables Ltd | Improvements in or relating to radio receivers |
-
0
- NL NL66625D patent/NL66625C/xx active
-
1946
- 1946-09-12 CH CH261237D patent/CH261237A/en unknown
- 1946-11-20 FR FR936844D patent/FR936844A/en not_active Expired
-
1947
- 1947-02-14 US US728707A patent/US2577489A/en not_active Expired - Lifetime
- 1947-04-23 GB GB10869/47A patent/GB623162A/en not_active Expired
-
1948
- 1948-11-26 DE DEP22675A patent/DE807629C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE807629C (en) | 1951-07-02 |
| CH261237A (en) | 1949-04-30 |
| FR936844A (en) | 1948-07-30 |
| NL66625C (en) | |
| US2577489A (en) | 1951-12-04 |
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