US2257570A - Neutralized system - Google Patents
Neutralized system Download PDFInfo
- Publication number
- US2257570A US2257570A US224063A US22406338A US2257570A US 2257570 A US2257570 A US 2257570A US 224063 A US224063 A US 224063A US 22406338 A US22406338 A US 22406338A US 2257570 A US2257570 A US 2257570A
- Authority
- US
- United States
- Prior art keywords
- circuit
- input
- frequency
- oscillations
- output
- 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
- 239000004020 conductor Substances 0.000 description 24
- 230000010355 oscillation Effects 0.000 description 22
- 238000013016 damping Methods 0.000 description 18
- 230000003472 neutralizing effect Effects 0.000 description 12
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 230000001627 detrimental effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- H03F1/12—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of attenuating means
- H03F1/13—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of attenuating means in discharge-tube amplifiers
-
- 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
- H03F1/14—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of neutralising means
- H03F1/16—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of neutralising means in discharge-tube amplifiers
-
- 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
Definitions
- This invention relates to a high frequency amplifier comprising neutralizing condensers for.
- the desired effect is obtained by tuning the conductors, by which one or more electrodes are connected to connecting points outside'the tube and whose inductance is not negligible for the oscillations to be amplified, to the frequency of the oscillations to be amplified, and by inserting a damping resistance in the conductor through which the input impedance and the neutralizing oondenser(s) are connected to the grid, said damping resistance being shunted by a short circuit for the oscillations to be amplified.
- This short-circuit preferably consistsof the series connection of an inductance and a capacity which is tuned to the frequency of the oscillations to be amplified.
- Figure 1 shows the diagram of connections of a well known neutralized amplifier comprising two push-pull connected discharge tubes.
- Figure 2 is the substitution diagram of the arrangement shown in Figure 1.
- Figure 3 shows the same diagram of connections but embodies the improvement according to the invention.
- Figure 4 illustrates an improvement of the arrangement shown in Figure 3.
- Figure 5 represents an arrangement compris-- ing an amplifying tube, according to the invention-
- the cathode grid and anode of two push-pull connected discharge tubes are designated by K1, G1, A1 and K2, G2, A2 respectively.
- an oscillatory circuit 3 to which are supplied the oscillations to be amplified and which is tuned to the frequency of the oscillations to be amplified.
- a circuit 4 which is also tuned to the frequency of the oscillations to be amplified, is connected between the anodes A1 and A2 of the tubes l and 2.
- the anodes A1 and A2 are connected to the grids G2 and G1 respectively through neutralizing condensers designated by C1 and C2.
- the cathodes K1 and K2 are interconnected through a conductor 5.
- the required feed sources are not represented in the drawings.
- the plates of the neutralizing condensers connected to the anode can be provided in the immediate vicinity of the anode, so that the conductors connecting the anodes A1 and A2 to'the connecting points 01 and 02 may be made very short so as to have a negligible inductance to the oscillations to be amplified.
- the conductors 1 connecting the grids. G1 and G2 to the connecting points P1 and P2 respectively, as well as the cathode connecting leads 5 usually have such a length that the inductances of these leads are not negligible in amplifying ultra high frequency oscillations.
- Figure 2 shows the substitution diagram of the arrangement represented in Figure 1, wherein the condensers between the point G1, K1, A1 and G2, K2, A2 respectively represent the inter-electrode capacities of the tubes I and 2 respectively. whereas the inductances 5, l, 8 represent the connecting leads between the two cathodes K1, K2 between the grid G1 and the connecting point P1 and between the grid 2 and the connecting point P2.
- the coil 20 in the grid supply conductor 1 of the tube l is coupled to a coil 22 inserted in the part of the conductor 5 between the point l4 and the cathode K1
- the coil 20 in the grid supply conductor 8 of the tube 2 is coupled to a coil 22 inserted in the part of the conductor 5 between the point l4 and the cathode K2.
- the maximum output energy is obtained by proportioning the coupling so that the coupling between the electrode supply conductors inside the tube is completely removed.
- thismeasure consists in inserting a damping resistance inthei conductors"! and' 8 through which the input. impedance and the neutralizing. condensersare connected to the grids, said damping resistancebeing bridged by ashortcircuit for the oscillations" to. b amplified.
- Figure 3 shows a. circuit arrangement according to the invention which substantially corresponds to the arrangement shown in Figure 1', but which embodies. the improvements constituting the obj ectsof the invention"
- the conductor 1' between G1 and. P1 and conductor 8 between G2 and P2 include a series condenser 11 by means of which these conductors are tuned to the frequency of the. oscillations to be amplified.
- these conductors comprise a damping resistance l9 which is bridged by ashort circuit for the oscillations. to be amplified.
- This short circuit consists of'the series connection of an inductance 2B and a capacity 2
- this detrimental influence is entirely or partly removed by providing that the inductance, which forms part of the circuiticonstituting. for the frequency to be amplified a short circuit of the damping resistance included in th grid cir-' cuit, is inductively coupled to the cathode lead.
- Figure 4 shows one form of construction of an amplifying circuit according totheiinvention, wherein this arrangement. is used.
- Each of the inductances is coupled. to an inductance 22 1
- Figure-5- showsan amplifying arrangement according toltheinvention which differs from the arrangerrrent represented in Figure 4 in that there is provided only a single amplifying tube I.
- the output. circuit 4 is connected between the anode and the cathode of the tube l and the grid is connected to one end of the input circuit 3 whose other end is connected through a neutralizing condenserCi to th anode. A point. on the input circuit 3 between the ends is connected to a point M of the cathode: conductor 5.
- the electrode-supply conductors 5, II and I are tuned, when necessary, by means of condensers l5, l8 and ll to the frequency of the, oscillations to be amplified, and the grid con.- ductor, 1 comprises a, damping resistance ['9 which is bridged by the series connection of a coil 20 and a condenser 2
- the coil 20 is inductively coupled to a coil 22 inserted in the cathodeconductor 5.
- the coils 20 and 22 shown in Figures 3, 4, and 5 need only have a slnall self induction and will often consist only of a single turn.
- Inanultra-high' frequency amplifying system an electron discharge tube having an input electrode, a cathode and an output electrode, a highfrequency' input circuit, a high frequency output circuit, means series tuned to the frequency of said input circuit connecting said input circuit to said input electrode, a damping resistance in series-With said means, means connecting said output circuit to said output electrode, neutralizing'means coupling said input and output electrodes, and a circuit series tuned to the frequencyof operation of said high frequency input circuit connecting said cathode to said high. frequency circuits.
- an electron discharge tube having an input electrode, a cathode and an output electrode, a high frequency input circuit, a high frequency output circuit, means series tuned to the frequency of said input circuit connecting said input circuit to said input electrode, means connecting said output circuit to said output electrode, neutralizing means coupling said input and output electrodes, a circuit series tuned to the frequency of operation of said high frequency circuits connecting said cathode to said high frequency circuits and a coupling between said series tuned circuit and said means series tuned to the frequency of said input circuit.
- a neutralized-amplifier comprising an electron discharge device having input and output electrodes including a cathode, high frequency input and output circuits connected with the input and output electrodes in said device respectively and aneutralizing circuit inter-connecting the said input and output electrodes, means for stabilizing said amplifier comprising means for tuning out the inductive reactance' in a connection between said circuits and an electrode of said device, means for reducing voltages of frequencies difierent than the frequency of operation of said circuits including a damping resistance in said connection and a circuit series tuned to the frequency of operation of said input and output circuits connected in shunt to said damping resistance.
- a system as recited in claim 3 wherein the cathode of said device is connected to said circuits by a circuit series tuned to the frequency of operation of said circuit and wherein said last named series tuned circuit is coupled to the circuit in shunt to said damping resistance.
- an electron discharge device having input and output electrodes including a cathode, high frequency input and output circuits connected with the input and output electrodes in said device respectively, a neutralizing circuit connected between said input and output electrodes, a portion of said neutralizing circuit connection being common to the connection of said input circuit to said input electrodes, means for stabilizing the operation of said amplifier comprising capacitive means in said common portion of said connections for tuning out the inductive reactance in said connections, means for reducing voltages of all frequencies different than the frequency of operation of said input and output circuits including a damping resistance in said common portion of said connections and a circuit series tuned to the frequency of operation of said input and output circuits connected in shunt to said damping resistance.
- an electron discharge device having an input electrode, an output electrode, and a cathode, high frequency input and output circuits connected with the input and output electrodes in said device respectively, a circuit series tuned to the frequency of operation of said input and output circuits in a connection between said cathode and said input and output circuits, a neutralizing circuit connected between said input and output electrodes, a portion of said neutralizing circuit connection being common to the connection of said input circuit to said input electrode, means for stabilizing the operation of said amplifier comprising capacitive means in said common portion of said connections for tuning out the inductive reactance in said connections, means for reducing voltages of all frequencies different than the frequency of operation of said input and output circuits including a damping resistance in said common portion of said connections and a circuit series tuned to the frequency of operation of said input and output circuits connected in shunt to said damping resistance, and a coupling between said series tuned circuit in shunt to said damping resistance, and said series tuned circuit in said connection between the cathode of said
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Filters And Equalizers (AREA)
- Microwave Amplifiers (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEN41142D DE734230C (de) | 1937-09-11 | 1937-09-11 | Radioempfaenger mit Schwundausgleich |
Publications (1)
Publication Number | Publication Date |
---|---|
US2257570A true US2257570A (en) | 1941-09-30 |
Family
ID=7348337
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US224063A Expired - Lifetime US2257570A (en) | 1937-09-11 | 1938-08-10 | Neutralized system |
Country Status (6)
Country | Link |
---|---|
US (1) | US2257570A (da) |
BE (1) | BE430082A (da) |
DE (1) | DE734230C (da) |
FR (1) | FR843184A (da) |
GB (1) | GB500790A (da) |
NL (1) | NL57282C (da) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7863978B1 (en) * | 2009-09-11 | 2011-01-04 | Harris Corporation | RF amplifier system for neutralizing internal capacitance in a cavity |
-
1937
- 1937-09-11 DE DEN41142D patent/DE734230C/de not_active Expired
-
1938
- 1938-08-10 US US224063A patent/US2257570A/en not_active Expired - Lifetime
- 1938-09-07 GB GB26177/38A patent/GB500790A/en not_active Expired
- 1938-09-08 BE BE430082D patent/BE430082A/xx unknown
- 1938-09-08 FR FR843184D patent/FR843184A/fr not_active Expired
- 1938-09-09 NL NL89661A patent/NL57282C/xx active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7863978B1 (en) * | 2009-09-11 | 2011-01-04 | Harris Corporation | RF amplifier system for neutralizing internal capacitance in a cavity |
Also Published As
Publication number | Publication date |
---|---|
NL57282C (da) | 1946-04-15 |
BE430082A (da) | 1938-10-31 |
DE734230C (de) | 1943-04-10 |
GB500790A (en) | 1939-02-15 |
FR843184A (fr) | 1939-06-27 |
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