NL235239A - - Google Patents
Info
- Publication number
- NL235239A NL235239A NL235239DA NL235239A NL 235239 A NL235239 A NL 235239A NL 235239D A NL235239D A NL 235239DA NL 235239 A NL235239 A NL 235239A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/1638—Special circuits to enhance selectivity of receivers not otherwise provided for
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Noise Elimination (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL235239 | 1959-01-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL235239A true NL235239A (browse.php) |
Family
ID=19751523
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL235239D NL235239A (browse.php) | 1959-01-19 | ||
| NL108353D NL108353C (browse.php) | 1959-01-19 |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL108353D NL108353C (browse.php) | 1959-01-19 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3098937A (browse.php) |
| BE (1) | BE586691A (browse.php) |
| CH (1) | CH382235A (browse.php) |
| DE (1) | DE1119344B (browse.php) |
| NL (2) | NL108353C (browse.php) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL274038A (browse.php) * | 1962-01-18 | |||
| US3238502A (en) * | 1962-06-28 | 1966-03-01 | Warwick Electronics Inc | Noise immunity circuit |
| US3171985A (en) * | 1962-12-20 | 1965-03-02 | Bell Telephone Labor Inc | Transistor pulse stretching circuit timed by an l-c ringing circuit |
| DE1214744B (de) * | 1963-12-20 | 1966-04-21 | Tekade Fernmeldeapp Ges Mit Be | Schaltungsanordnung zum selektiven Empfang tonfrequenter Signale in Fernmelde-, insbesondere Fernsprechanlagen |
| DE1255144B (de) * | 1964-04-30 | 1967-11-30 | Siemens Ag | Pilotempfaenger mit selbsttaetiger Eigenfunktionsueberwachung fuer Nachrichtenuebertragungssysteme |
| US3372314A (en) * | 1965-03-31 | 1968-03-05 | American Meter Co | Means and techniques useful in tone receivers |
| GB1312238A (en) * | 1969-07-25 | 1973-04-04 | Mullard Ltd | Transistor amplifier and limiter circuits |
| US3711793A (en) * | 1970-12-24 | 1973-01-16 | Rca Corp | High power microwave switch including a plurality of diodes and conductive rods |
| AT346099B (de) * | 1976-08-05 | 1978-10-25 | Philips Nv | Wiedergabegeraet |
| US4396893A (en) * | 1981-06-01 | 1983-08-02 | The United States Of America As Represented By The Secretary Of The Navy | Frequency selective limiter |
| US4383229A (en) * | 1981-07-20 | 1983-05-10 | Circuit Research Labs | Resonant filter clipper circuit |
| US5280256A (en) * | 1991-08-23 | 1994-01-18 | The United States Of America As Represented By The Secretary Of The Army | Limiting filter |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE634615C (de) * | 1932-10-18 | 1936-08-31 | Siemens & Halske Akt Ges | Signalempfaenger fuer Fernsprechanlagen |
| US2369621A (en) * | 1942-07-02 | 1945-02-13 | Philco Radio & Television Corp | Frequency modulation receiver |
| US2485731A (en) * | 1947-05-02 | 1949-10-25 | Hazeltine Research Inc | Wave-signal amplitude-limiting system |
| GB675400A (en) * | 1949-03-10 | 1952-07-09 | Philips Electrical Ind Ltd | Improvements in amplitude-limiting circuits |
| DE935976C (de) * | 1953-08-09 | 1955-12-01 | Siemens Ag | Schaltungsanordnung zur Fernhaltung von Ruf- und Wahlspannungen vom Eingang des Traegerfrequenzsystems |
| US2892080A (en) * | 1953-11-10 | 1959-06-23 | Westinghouse Electric Corp | Limiter for radio circuits |
| US3012202A (en) * | 1956-06-19 | 1961-12-05 | William M Waters | Jump amplifier circuit |
| NL208403A (browse.php) * | 1956-06-27 | |||
| US2912573A (en) * | 1956-10-17 | 1959-11-10 | Motorola Inc | Receiver having frequency-and-amplitude-modulation-detecting limiter stage |
| US3012197A (en) * | 1958-10-27 | 1961-12-05 | Gen Radio Co | Calibration apparatus |
-
0
- NL NL235239D patent/NL235239A/xx unknown
- NL NL108353D patent/NL108353C/xx active
-
1959
- 1959-12-30 US US862818A patent/US3098937A/en not_active Expired - Lifetime
-
1960
- 1960-01-18 DE DEJ17548A patent/DE1119344B/de active Pending
- 1960-01-19 CH CH53160A patent/CH382235A/de unknown
- 1960-01-19 BE BE586691A patent/BE586691A/nl unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE586691A (nl) | 1960-07-19 |
| NL108353C (browse.php) | |
| DE1119344B (de) | 1961-12-14 |
| CH382235A (de) | 1964-09-30 |
| US3098937A (en) | 1963-07-23 |