GB563520A - Improvements in or relating to electrical apparatus including networks suitable for use for dual signal transmission - Google Patents
Improvements in or relating to electrical apparatus including networks suitable for use for dual signal transmissionInfo
- Publication number
- GB563520A GB563520A GB5162/43A GB516243A GB563520A GB 563520 A GB563520 A GB 563520A GB 5162/43 A GB5162/43 A GB 5162/43A GB 516243 A GB516243 A GB 516243A GB 563520 A GB563520 A GB 563520A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relating
- signal transmission
- apparatus including
- electrical apparatus
- including networks
- 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
- H03D5/00—Circuits for demodulating amplitude-modulated or angle-modulated oscillations at will
-
- 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
- H03H7/0169—Intermediate frequency filters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Small-Scale Networks (AREA)
Abstract
563,520. Wireless receiving circuits; selective networks. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. March 31, 1943, No. 5162. Convention date, Jan. 7, 1941. [Classes 40 (iii) and 40 (v)] A coupling circuit for the I.F. stage of a dualpurpose receiver comprises a pair of circuits L1, C1 and L2, C2 tuned to a high I.F. (say, 4.3 megacycles) for frequency-modulated waves and coupled by means of a common capacity C3 so as to give a band-pass effect, the capacity being tuned by an inductance L3 to a low I.F. (say, 455 kilocycles) for amplitude-modulated signals. At that frequency, the circuit acts as an anti-resonant circuit, the elements C1, L1, C2, L2 being without effect. An example of values for the components is given in the Specification.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US563520XA | 1941-01-07 | 1941-01-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB563520A true GB563520A (en) | 1944-08-17 |
Family
ID=22003837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5162/43A Expired GB563520A (en) | 1941-01-07 | 1943-03-31 | Improvements in or relating to electrical apparatus including networks suitable for use for dual signal transmission |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB563520A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE864704C (en) * | 1949-11-06 | 1953-01-26 | Siemens Ag | High frequency band filters, e.g. B. for intermediate frequency amplifiers in radio equipment |
| CN114553263A (en) * | 2022-04-27 | 2022-05-27 | 杭州禾迈电力电子股份有限公司 | Power line carrier communication device and method |
-
1943
- 1943-03-31 GB GB5162/43A patent/GB563520A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE864704C (en) * | 1949-11-06 | 1953-01-26 | Siemens Ag | High frequency band filters, e.g. B. for intermediate frequency amplifiers in radio equipment |
| CN114553263A (en) * | 2022-04-27 | 2022-05-27 | 杭州禾迈电力电子股份有限公司 | Power line carrier communication device and method |
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