US2231867A - allen - Google Patents
allen Download PDFInfo
- Publication number
- US2231867A US2231867A US2231867DA US2231867A US 2231867 A US2231867 A US 2231867A US 2231867D A US2231867D A US 2231867DA US 2231867 A US2231867 A US 2231867A
- Authority
- US
- United States
- Prior art keywords
- primary
- transformer
- loading
- selectivity
- allen
- 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 - Lifetime
Links
- 238000011068 loading method Methods 0.000 description 12
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 241000282326 Felis catus Species 0.000 description 1
- 241001387976 Pera Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- JXSJBGJIGXNWCI-UHFFFAOYSA-N diethyl 2-[(dimethoxyphosphorothioyl)thio]succinate Chemical compound CCOC(=O)CC(SP(=S)(OC)OC)C(=O)OCC JXSJBGJIGXNWCI-UHFFFAOYSA-N 0.000 description 1
- 201000002266 mite infestation Diseases 0.000 description 1
- 229940061319 ovide Drugs 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/22—Automatic control in amplifiers having discharge tubes
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
Definitions
- the 25 f ectivity curve for the tuned ine frequency transformer indicated at ry oaded y voltage is cause by he sp e c ar e e ct, e m a 0 ting resist her y the se- 0 eioud ei ctro s u in e cat o e l "e '1S made T39m-topped
- the CUYVG a 30 v t c th d nd varyi g m size selectivity ar t risti oi the with manges n mas the iiiae.
- a variable gain band pass ampliiier stage comprising a transformer having a primary and a secondary, said primary and secondary being so tuned and coupled as to have a double peaked selectivity characteristic in the absence of loading on the transformer, an amplifier tube having a plurality of electrodes including input electrodes, means for coupling said secondary across said input electrodes, means for varying the direct current potential applied .to one of said electrodes whereby the gain of said amplifier stage may be controlled, and means for so resistively loading both said primary and said secondary that the selectivity characteristic of said tuned transformer is substantially flat-topped, said primary and said secondary being resistively loaded unlike amounts, the ratio of primary loading to secondary loading being such that said selectivity characteristic remains substantially nat-topped during changes in said direct current potential.
- a variable gain band pass ampliiier stage comprising a transformer having a primary and a secondary, said primary and secondary being so tuned and coupled as to have a double peaked selectivity characteristic in the absence of loading on the transformer, an amplier tube havmg input electrodes, means for coupling said secondary across said input electrodes, means for varying the direct current potential between the input electrodes of said tube whereby the gain of said amplifier stage may be controlled, and means for so resistively loading both said primary and said secondary that the selectivity characteristic of said tuned transformer is substantially attopped, said primary and said secondary being resistively loaded unlike amounts, the ratio of primary loading to secondary loading being such that said selectivity characteristic remains substantially flat-topped during changes in said direct current potential.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Description
H. C. ALLEN HIGH FREQUENCY AMPMFIER @my mwN N l wenn Feb. 18
.DMG .BNQ FON WN NN\ Horace Clifford HZZ l torucy -rl I IllhwA Feb. 18, v1941. H. c. ALLEN HIGH FREQUENCY AMPLIFIER Original Filed Aug. 29, 1936 2 Sheets-Sheet 2 All/9 Suventor Horacf.' Clifford HZZ/en/ 1w Gttorneg Patented Feb. 18, i941 OFFICE n tion' a pair oi curves and a. circuit diah are referred to in explaining another 20 e an circuit diagram of stili another will best be understood by refero Figures 3` and 4. In Figure 2 the 25 f ectivity curve for the tuned ine frequency transformer indicated at ry oaded y voltage is cause by he sp e c ar e e ct, e m a 0 ting resist her y the se- 0 eioud ei ctro s u in e cat o e l "e '1S made T39m-topped The CUYVG a 30 v t c th d nd varyi g m size selectivity ar t risti oi the with manges n mas the iiiae. @rm Wh th Cepam s m 1 i b p t a he pera n of 9, eluded i tr nsio m econdary v. C circuit in e beve-me tion d type of The Cep C 1 pr en 'n all mphers e 3v receiver vv 1 tend t de e the I, am hier cause oi the input capacity oi the amplifier tube. 35 'it i ect o riventio ovide an 1i the Capa @MOV d, S b king t e improved t vision s ort Wa e rad o receiver con g t mphfl T t be OTE nega-GWB oi the type h vm ther man i utomatic fOr the D il edv-Cine ga n the amvoiume or ga n nt Y he thereby duci he inp t capacity,
40 Mor specificaiiy, 1s a obiect ci my inventhe selectivity curve oi the i. F. transformer I o tion to provide an improved high frequency amiS 21S Sho by Y1 @u SWG S Ch Stages "ffr sn designed that its gai maybe varied are conn ct d n casca ,t overall selectivity the curv n "^^+inq its selectivity chaac- Characteristic '1S aS e viousiy such a selectivity characteristic is urimmme asit Aaccentuates the high irequenciea 5 '"Mre 3. the curve a is the sefrmer 4 hav- I claim as my invention:
1. A variable gain band pass ampliiier stage comprising a transformer having a primary and a secondary, said primary and secondary being so tuned and coupled as to have a double peaked selectivity characteristic in the absence of loading on the transformer, an amplifier tube having a plurality of electrodes including input electrodes, means for coupling said secondary across said input electrodes, means for varying the direct current potential applied .to one of said electrodes whereby the gain of said amplifier stage may be controlled, and means for so resistively loading both said primary and said secondary that the selectivity characteristic of said tuned transformer is substantially flat-topped, said primary and said secondary being resistively loaded unlike amounts, the ratio of primary loading to secondary loading being such that said selectivity characteristic remains substantially nat-topped during changes in said direct current potential.
2. The invention according to claim 1 characterized in that the ratio of one of said loadings to the other of said loadings is less than 3 to 1 and greater than 1 to 1.
3. The invention according .to claim 1 characterized in that the ratio of one of said loadings to the other of said loadings is oi the order of 2 to l.
4. A variable gain band pass ampliiier stage comprising a transformer having a primary and a secondary, said primary and secondary being so tuned and coupled as to have a double peaked selectivity characteristic in the absence of loading on the transformer, an amplier tube havmg input electrodes, means for coupling said secondary across said input electrodes, means for varying the direct current potential between the input electrodes of said tube whereby the gain of said amplifier stage may be controlled, and means for so resistively loading both said primary and said secondary that the selectivity characteristic of said tuned transformer is substantially attopped, said primary and said secondary being resistively loaded unlike amounts, the ratio of primary loading to secondary loading being such that said selectivity characteristic remains substantially flat-topped during changes in said direct current potential.
HORACE CLIFFORD ALLEN.
Feb. 1s, 1941.
l W. T. ALLEN so'LDERLEss CONNECTOR Filed Feb. 26. -1940 INVENTOR- e. BY Wal/ace fil/en i l W ATT RN
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US501211XA | 1936-08-29 | 1936-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2231867A true US2231867A (en) | 1941-02-18 |
Family
ID=21963483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US2231867D Expired - Lifetime US2231867A (en) | 1936-08-29 | allen |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2231867A (en) |
| BE (1) | BE423304A (en) |
| DE (1) | DE685150C (en) |
| GB (1) | GB501211A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2430983A (en) * | 1939-07-24 | 1947-11-18 | United Geophysical Company Inc | Seismic amplifying system |
| US3231686A (en) * | 1961-06-14 | 1966-01-25 | Maico Electronics Inc | Acoustic apparatus |
-
0
- US US2231867D patent/US2231867A/en not_active Expired - Lifetime
- BE BE423304D patent/BE423304A/xx unknown
-
1937
- 1937-08-30 GB GB23676/37A patent/GB501211A/en not_active Expired
- 1937-08-31 DE DER100159D patent/DE685150C/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2430983A (en) * | 1939-07-24 | 1947-11-18 | United Geophysical Company Inc | Seismic amplifying system |
| US3231686A (en) * | 1961-06-14 | 1966-01-25 | Maico Electronics Inc | Acoustic apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| BE423304A (en) | |
| DE685150C (en) | 1939-12-13 |
| GB501211A (en) | 1939-02-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB777807A (en) | Improvements in or relating to television receivers | |
| US2231867A (en) | allen | |
| US3130374A (en) | Negative feedback tone control circuit | |
| GB514073A (en) | Improvements in thermionic amplifier stages | |
| GB536616A (en) | Improvements in feedback circuit arrangements for use in thermionic valve repeater or amplifier circuit arrangements | |
| US1992044A (en) | Static reducing system | |
| USD71770S (en) | Design for a radio loop aerial | |
| US2112065A (en) | High frequency amplifier | |
| USD140593S (en) | Design fob an articulated fabric or the like | |
| USD83745S (en) | Design for a watch fob or similar article | |
| USD83184S (en) | Design for an aeroplane | |
| USD83300S (en) | Design fob | |
| USD91913S (en) | Design for a service station | |
| USD86096S (en) | Jacob s | |
| USD113028S (en) | Design for a radio receiver cabinet | |
| USD85306S (en) | Design for a radiocabinet | |
| GB414709A (en) | Improvements in fly screens | |
| USD155362S (en) | Tv ray airplane | |
| USD86647S (en) | Design for a radiocabinet | |
| USD77414S (en) | Design for a chair frame | |
| USD118926S (en) | Design fob a belt buckle | |
| USD167763S (en) | Dinner plate or similar article | |
| USD91266S (en) | Design for a grille or the like | |
| USD81855S (en) | Edward a | |
| SU48578A1 (en) | Device for neutralizing the power amplifier cascade |