Dual port modulator
The present invention relates generally to the field of frequency modulation, and in particular to dual port frequency modulators. The present invention provides a frequency modulator comprising a phase lock loop circuit ( 108 ) for receiving and modulating a carrier signal according to the low freq...
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| creator | LIM ANNYEN MOKHTAR FUAD HAJI |
| description | The present invention relates generally to the field of frequency modulation, and in particular to dual port frequency modulators. The present invention provides a frequency modulator comprising a phase lock loop circuit ( 108 ) for receiving and modulating a carrier signal according to the low frequency component of a modulating signal, the phase lock loop circuit comprising a voltage controlled oscillator ( 118 ) for outputting a modulated carrier signal and a loop filter ( 116 ) for outputting a steering voltage to the VCO, the VCO having a tank circuit ( 120 ) comprising a voltage controlled capacitance (VAR 1 ). The frequency modulator also comprises an external voltage controlled capacitance ( 122 ) which is arranged to modulate its capacitance according to a high frequency component of the modulating signal, the second voltage controlled capacitance being coupled to the tank circuit. The phase lock loop circuit ( 108 ) is further arranged to modulate the steering voltage to the VCO ( 118 ) with the hig |
| format | Patent |
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The present invention provides a frequency modulator comprising a phase lock loop circuit ( 108 ) for receiving and modulating a carrier signal according to the low frequency component of a modulating signal, the phase lock loop circuit comprising a voltage controlled oscillator ( 118 ) for outputting a modulated carrier signal and a loop filter ( 116 ) for outputting a steering voltage to the VCO, the VCO having a tank circuit ( 120 ) comprising a voltage controlled capacitance (VAR 1 ). The frequency modulator also comprises an external voltage controlled capacitance ( 122 ) which is arranged to modulate its capacitance according to a high frequency component of the modulating signal, the second voltage controlled capacitance being coupled to the tank circuit. The phase lock loop circuit ( 108 ) is further arranged to modulate the steering voltage to the VCO ( 118 ) with the hig</description><language>chi ; eng</language><subject>BASIC ELECTRONIC CIRCUITRY ; ELECTRICITY ; MODULATION</subject><creationdate>2008</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=20080813&DB=EPODOC&CC=CN&NR=101243608A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76318</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20080813&DB=EPODOC&CC=CN&NR=101243608A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>LIM ANNYEN</creatorcontrib><creatorcontrib>MOKHTAR FUAD HAJI</creatorcontrib><title>Dual port modulator</title><description>The present invention relates generally to the field of frequency modulation, and in particular to dual port frequency modulators. The present invention provides a frequency modulator comprising a phase lock loop circuit ( 108 ) for receiving and modulating a carrier signal according to the low frequency component of a modulating signal, the phase lock loop circuit comprising a voltage controlled oscillator ( 118 ) for outputting a modulated carrier signal and a loop filter ( 116 ) for outputting a steering voltage to the VCO, the VCO having a tank circuit ( 120 ) comprising a voltage controlled capacitance (VAR 1 ). The frequency modulator also comprises an external voltage controlled capacitance ( 122 ) which is arranged to modulate its capacitance according to a high frequency component of the modulating signal, the second voltage controlled capacitance being coupled to the tank circuit. The phase lock loop circuit ( 108 ) is further arranged to modulate the steering voltage to the VCO ( 118 ) with the hig</description><subject>BASIC ELECTRONIC CIRCUITRY</subject><subject>ELECTRICITY</subject><subject>MODULATION</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2008</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZBB2KU3MUSjILypRyM1PKc1JLMkv4mFgTUvMKU7lhdLcDIpuriHOHrqpBfnxqcUFicmpeakl8c5-hgaGRibGZgYWjsbEqAEAHnQgTg</recordid><startdate>20080813</startdate><enddate>20080813</enddate><creator>LIM ANNYEN</creator><creator>MOKHTAR FUAD HAJI</creator><scope>EVB</scope></search><sort><creationdate>20080813</creationdate><title>Dual port modulator</title><author>LIM ANNYEN ; MOKHTAR FUAD HAJI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CN101243608A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>chi ; eng</language><creationdate>2008</creationdate><topic>BASIC ELECTRONIC CIRCUITRY</topic><topic>ELECTRICITY</topic><topic>MODULATION</topic><toplevel>online_resources</toplevel><creatorcontrib>LIM ANNYEN</creatorcontrib><creatorcontrib>MOKHTAR FUAD HAJI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>LIM ANNYEN</au><au>MOKHTAR FUAD HAJI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Dual port modulator</title><date>2008-08-13</date><risdate>2008</risdate><abstract>The present invention relates generally to the field of frequency modulation, and in particular to dual port frequency modulators. The present invention provides a frequency modulator comprising a phase lock loop circuit ( 108 ) for receiving and modulating a carrier signal according to the low frequency component of a modulating signal, the phase lock loop circuit comprising a voltage controlled oscillator ( 118 ) for outputting a modulated carrier signal and a loop filter ( 116 ) for outputting a steering voltage to the VCO, the VCO having a tank circuit ( 120 ) comprising a voltage controlled capacitance (VAR 1 ). The frequency modulator also comprises an external voltage controlled capacitance ( 122 ) which is arranged to modulate its capacitance according to a high frequency component of the modulating signal, the second voltage controlled capacitance being coupled to the tank circuit. The phase lock loop circuit ( 108 ) is further arranged to modulate the steering voltage to the VCO ( 118 ) with the hig</abstract><oa>free_for_read</oa></addata></record> |
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| language | chi ; eng |
| recordid | cdi_epo_espacenet_CN101243608A |
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| subjects | BASIC ELECTRONIC CIRCUITRY ELECTRICITY MODULATION |
| title | Dual port modulator |
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