Filter which tracks changing frequency of input signal
A tracking band-pass filter useful for locking onto, and passing, an input signal which changes rapidly in frequency. The filter has a frequency pass band controlled by a rectangular voltage waveform which is derived from the output signal passed by the filter. The filter output signal is translated...
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| creator | SUTPHIN, ELDON M JR |
| description | A tracking band-pass filter useful for locking onto, and passing, an input signal which changes rapidly in frequency. The filter has a frequency pass band controlled by a rectangular voltage waveform which is derived from the output signal passed by the filter. The filter output signal is translated from a sine wave to a pulse wave. The period between each two successive pulses is measured by counting the cycles of an oscillator during each respective period. The time-representing count is inverted to a frequency-representing count which controls the duty cycle of a rectangular wave used to make the filter track the changing frequency of the input signal. |
| format | Patent |
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The filter has a frequency pass band controlled by a rectangular voltage waveform which is derived from the output signal passed by the filter. The filter output signal is translated from a sine wave to a pulse wave. The period between each two successive pulses is measured by counting the cycles of an oscillator during each respective period. The time-representing count is inverted to a frequency-representing count which controls the duty cycle of a rectangular wave used to make the filter track the changing frequency of the input signal.</description><language>eng</language><subject>BASIC ELECTRONIC CIRCUITRY ; ELECTRICITY ; IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS ; PULSE TECHNIQUE ; RESONATORS ; SELECTING RESONANT CIRCUITS ; TUNING RESONANT CIRCUITS</subject><creationdate>1980</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=19800520&DB=EPODOC&CC=US&NR=4204171A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,777,882,25545,76296</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19800520&DB=EPODOC&CC=US&NR=4204171A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>SUTPHIN, ELDON M JR</creatorcontrib><title>Filter which tracks changing frequency of input signal</title><description>A tracking band-pass filter useful for locking onto, and passing, an input signal which changes rapidly in frequency. 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The time-representing count is inverted to a frequency-representing count which controls the duty cycle of a rectangular wave used to make the filter track the changing frequency of the input signal.</description><subject>BASIC ELECTRONIC CIRCUITRY</subject><subject>ELECTRICITY</subject><subject>IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS</subject><subject>PULSE TECHNIQUE</subject><subject>RESONATORS</subject><subject>SELECTING RESONANT CIRCUITS</subject><subject>TUNING RESONANT CIRCUITS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1980</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDBzy8wpSS1SKM_ITM5QKClKTM4uVkjOSMxLz8xLV0grSi0sTc1LrlTIT1PIzCsoLVEozkzPS8zhYWBNS8wpTuWF0twM8m6uIc4euqkF-fGpxQWJyal5qSXxocEmRgYmhuaGjsaEVQAA8zEs4g</recordid><startdate>19800520</startdate><enddate>19800520</enddate><creator>SUTPHIN, ELDON M JR</creator><scope>EVB</scope></search><sort><creationdate>19800520</creationdate><title>Filter which tracks changing frequency of input signal</title><author>SUTPHIN, ELDON M JR</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US4204171A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1980</creationdate><topic>BASIC ELECTRONIC CIRCUITRY</topic><topic>ELECTRICITY</topic><topic>IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS</topic><topic>PULSE TECHNIQUE</topic><topic>RESONATORS</topic><topic>SELECTING RESONANT CIRCUITS</topic><topic>TUNING RESONANT CIRCUITS</topic><toplevel>online_resources</toplevel><creatorcontrib>SUTPHIN, ELDON M JR</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>SUTPHIN, ELDON M JR</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Filter which tracks changing frequency of input signal</title><date>1980-05-20</date><risdate>1980</risdate><abstract>A tracking band-pass filter useful for locking onto, and passing, an input signal which changes rapidly in frequency. The filter has a frequency pass band controlled by a rectangular voltage waveform which is derived from the output signal passed by the filter. The filter output signal is translated from a sine wave to a pulse wave. The period between each two successive pulses is measured by counting the cycles of an oscillator during each respective period. The time-representing count is inverted to a frequency-representing count which controls the duty cycle of a rectangular wave used to make the filter track the changing frequency of the input signal.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | BASIC ELECTRONIC CIRCUITRY ELECTRICITY IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS PULSE TECHNIQUE RESONATORS SELECTING RESONANT CIRCUITS TUNING RESONANT CIRCUITS |
| title | Filter which tracks changing frequency of input signal |
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