Frequenzdemodulationsschaltung

942,894. Frequency discriminators. PHILIPS ELECTRICAL INDUSTRIES Ltd. Jan. 27, 1961 [Jan. 30, 1960], No. 3256/61. Heading H3A. In a modified Foster-Seeley discriminator, a series tuned LCR circuit 2 is fed by a current i such that quadrature components of magnitude Qi, together with the in-phase cur...

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Hauptverfasser:	STARREVELD,JAAP, ZADEL,WIM
Format:	Patent
Sprache:	ger
Schlagworte:	BASIC ELECTRONIC CIRCUITRY DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TOANOTHER ELECTRICITY
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description	942,894. Frequency discriminators. PHILIPS ELECTRICAL INDUSTRIES Ltd. Jan. 27, 1961 [Jan. 30, 1960], No. 3256/61. Heading H3A. In a modified Foster-Seeley discriminator, a series tuned LCR circuit 2 is fed by a current i such that quadrature components of magnitude Qi, together with the in-phase current i are fed to a push-pull rectifier arrangement with a push-pull output 10. In Fig. 5, the rectifiers are fed by a T network 12, 13, 14 and the circuit 2 includes two series-connected capacitors 25, 26 whose values are such that the impedances of the capacitor 25 and of the network 3 and 26 are equal at a chosen harmonic of the mean input frequency. In Fig. 7, the rectifiers are replaced by the emitters and bases of PNP transistors 17, 18, and the L/C arrangements of Fig. 5 are transposed to provide a biasing arrangement for a previous NPN driver transistor 35.
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In a modified Foster-Seeley discriminator, a series tuned LCR circuit 2 is fed by a current i such that quadrature components of magnitude Qi, together with the in-phase current i are fed to a push-pull rectifier arrangement with a push-pull output 10. In Fig. 5, the rectifiers are fed by a T network 12, 13, 14 and the circuit 2 includes two series-connected capacitors 25, 26 whose values are such that the impedances of the capacitor 25 and of the network 3 and 26 are equal at a chosen harmonic of the mean input frequency. In Fig. 7, the rectifiers are replaced by the emitters and bases of PNP transistors 17, 18, and the L/C arrangements of Fig. 5 are transposed to provide a biasing arrangement for a previous NPN driver transistor 35.</description><edition>1</edition><language>ger</language><subject>BASIC ELECTRONIC CIRCUITRY ; DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TOANOTHER ; ELECTRICITY</subject><creationdate>1965</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19651031&DB=EPODOC&CC=CH&NR=401169A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76293</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19651031&DB=EPODOC&CC=CH&NR=401169A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>STARREVELD,JAAP</creatorcontrib><creatorcontrib>ZADEL,WIM</creatorcontrib><title>Frequenzdemodulationsschaltung</title><description>942,894. Frequency discriminators. PHILIPS ELECTRICAL INDUSTRIES Ltd. Jan. 27, 1961 [Jan. 30, 1960], No. 3256/61. Heading H3A. In a modified Foster-Seeley discriminator, a series tuned LCR circuit 2 is fed by a current i such that quadrature components of magnitude Qi, together with the in-phase current i are fed to a push-pull rectifier arrangement with a push-pull output 10. In Fig. 5, the rectifiers are fed by a T network 12, 13, 14 and the circuit 2 includes two series-connected capacitors 25, 26 whose values are such that the impedances of the capacitor 25 and of the network 3 and 26 are equal at a chosen harmonic of the mean input frequency. In Fig. 7, the rectifiers are replaced by the emitters and bases of PNP transistors 17, 18, and the L/C arrangements of Fig. 5 are transposed to provide a biasing arrangement for a previous NPN driver transistor 35.</description><subject>BASIC ELECTRONIC CIRCUITRY</subject><subject>DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TOANOTHER</subject><subject>ELECTRICITY</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1965</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZJBzK0otLE3Nq0pJzc1PKc1JLMnMzysuTs5IzCkpzUvnYWBNS8wpTuWF0txADa4hzh66qQX58anFBYnJqXmpJfHOHiYGhoZmlo7GBBUAAJFOJE4</recordid><startdate>19651031</startdate><enddate>19651031</enddate><creator>STARREVELD,JAAP</creator><creator>ZADEL,WIM</creator><scope>EVB</scope></search><sort><creationdate>19651031</creationdate><title>Frequenzdemodulationsschaltung</title><author>STARREVELD,JAAP ; ZADEL,WIM</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CH401169A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>ger</language><creationdate>1965</creationdate><topic>BASIC ELECTRONIC CIRCUITRY</topic><topic>DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TOANOTHER</topic><topic>ELECTRICITY</topic><toplevel>online_resources</toplevel><creatorcontrib>STARREVELD,JAAP</creatorcontrib><creatorcontrib>ZADEL,WIM</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>STARREVELD,JAAP</au><au>ZADEL,WIM</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Frequenzdemodulationsschaltung</title><date>1965-10-31</date><risdate>1965</risdate><abstract>942,894. Frequency discriminators. PHILIPS ELECTRICAL INDUSTRIES Ltd. Jan. 27, 1961 [Jan. 30, 1960], No. 3256/61. Heading H3A. In a modified Foster-Seeley discriminator, a series tuned LCR circuit 2 is fed by a current i such that quadrature components of magnitude Qi, together with the in-phase current i are fed to a push-pull rectifier arrangement with a push-pull output 10. In Fig. 5, the rectifiers are fed by a T network 12, 13, 14 and the circuit 2 includes two series-connected capacitors 25, 26 whose values are such that the impedances of the capacitor 25 and of the network 3 and 26 are equal at a chosen harmonic of the mean input frequency. In Fig. 7, the rectifiers are replaced by the emitters and bases of PNP transistors 17, 18, and the L/C arrangements of Fig. 5 are transposed to provide a biasing arrangement for a previous NPN driver transistor 35.</abstract><edition>1</edition><oa>free_for_read</oa></addata></record>
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title	Frequenzdemodulationsschaltung
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