GB507620A - Improvements in band pass selectors for modulated-carrier signal-translating apparatus - Google Patents
Improvements in band pass selectors for modulated-carrier signal-translating apparatusInfo
- Publication number
- GB507620A GB507620A GB28206/38A GB2820638A GB507620A GB 507620 A GB507620 A GB 507620A GB 28206/38 A GB28206/38 A GB 28206/38A GB 2820638 A GB2820638 A GB 2820638A GB 507620 A GB507620 A GB 507620A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phase
- circuit
- valve
- circuits
- 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
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/0153—Electrical filters; Controlling thereof
- H03H7/0161—Bandpass filters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/17—Structural details of sub-circuits of frequency selective networks
- H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
- H03H7/1775—Parallel LC in shunt or branch path
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
507,620. Valve circuits for wireless reception ; impedance networks. HAZELTINE CORPORATION. Sept. 28, 1938, No. 28206. Convention date, Oct. 16, 1937. [Classes 40 (iii) and 40 (v)] In a band-pass circuit, the voltage output, variable in phase with the frequency of the input, from a network C1, LI; C2, 2L2; C3, L3 is. combined with a voltage, the phase of which varies less rapidly with frequency, the constants of the circuit being such that the two voltages are in phase at the centre frequency and opposite in phase at the limiting frequencies of the band. The second voltage may be derived from a resistance 15 in the input circuit, Fig. 1, or from a coupling 28 to a further tuned circuit 25, 26 in the output of valve 14, Fig. 5. The arrangement gives a characteristic curve as shown at 20, Fig. 3, having a zero response at 10 kc. on each side of the centre, and this may be converted to the characteristic 22, Fig. 4, by increasing the coupling of the tuned circuits or by symmetrically detuning two of the circuits. In the arrangement shown in Fig. 5, inherent input capacity 30 in the valve 16 may be neutralized by a connection over a condenser 31 to part of winding 28.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US507620XA | 1937-10-16 | 1937-10-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB507620A true GB507620A (en) | 1939-06-19 |
Family
ID=21967257
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB28206/38A Expired GB507620A (en) | 1937-10-16 | 1938-09-28 | Improvements in band pass selectors for modulated-carrier signal-translating apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB507620A (en) |
-
1938
- 1938-09-28 GB GB28206/38A patent/GB507620A/en not_active Expired
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