Ceramic Filters "CERAFIL®" Application Manual by Murata Manufacturing Co.,Ltd.

More catalogs by Murata Manufacturing Co.,Ltd. | Ceramic Filters "CERAFIL®" Application Manual | 26 pages | 2013-07-30

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note s0leasereadratingand 54 forstorageandoperating rating solderingandmounting handlinginthiscatalogtopreventsmokingandorburning etc s4hiscataloghasonlytypicalspecifications4herefore pleaseapproveourproductspecificationsortransacttheapprovalsheetforproductspecificationsbeforeordering p11e-2.pdf aug.20,2012 1 types of cerafil® types of cerafil® and applicable markets radio communication equipment k k k cordless phone kkkk wireless data communication kkkkkk portable audio mobile phone k k 1 smd type types of cerafil® typical center frequency k 450khz 455khz kkkk lead type k k k ceramic filter smd type kkkkk lead type 10.7mhz kkkkk 4.5mhz 5.5mhz 6.0mhz 6.5mhz k ceramic discriminator 450khz 455khz k 10.7mhz kkkk ceramic trap 4.5mhz 5.5mhz 6.0mhz 6.5mhz k 2 rke tpms hi-fi audio car audio tv

note s0leasereadratingand 54 forstorageandoperating rating solderingandmounting handlinginthiscatalogtopreventsmokingandorburning etc s4hiscataloghasonlytypicalspecifications4herefore pleaseapproveourproductspecificationsortransacttheapprovalsheetforproductspecificationsbeforeordering p11e-2.pdf aug.20,2012 operating principle of cerafil® 3 2 what is piezoelectric ceramics some piezoelectric crystals can be calcined into polycrystal ceramics though there is a spontaneous polarization in each of the fine crystals in the piezoelectric ceramics which is cancelled as a whole and shows no piezoelectricity but when a high d.c voltage is applied to such ceramics the directions of the spontaneous polarizations are brought to a uniformity and a ferroelectricity ceramics is attained with some additives the material with extremely stable frequency temperature and aging characteristics is being used by murata for cerafil® compared with the single crystal the piezoelectric ceramics has various

note s0leasereadratingand 54 forstorageandoperating rating solderingandmounting handlinginthiscatalogtopreventsmokingandorburning etc s4hiscataloghasonlytypicalspecifications4herefore pleaseapproveourproductspecificationsortransacttheapprovalsheetforproductspecificationsbeforeordering p11e-2.pdf aug.20,2012 operating principle of cerafil® 3 4 cerafil® when the piezoelectric ceramics described above is polarized by providing a pair of electrodes so that it can be excited in a prescribed vibrating mode and if a suitable matching impedance is applied to operate it a cerafil® is completed a model example of 455 khz cerafil® for am is shown in fig 3-6 input driving electrode output pick-up electrode ceramics 3 ground fig.3-6 model of the 455 khz cerafil® for am

note s0leasereadratingand 54 forstorageandoperating rating solderingandmounting handlinginthiscatalogtopreventsmokingandorburning etc s4hiscataloghasonlytypicalspecifications4herefore pleaseapproveourproductspecificationsortransacttheapprovalsheetforproductspecificationsbeforeordering p11e-2.pdf aug.20,2012 technical terms of cerafil® 4 2 other terminologies 1 input/output impedance signifies the internal impedance value of the input and output side at the center frequency of cerafil® and it is expressed in it causes no problem even if the input and the output are used in reverse with cerafil® since the input and the output impedance are in a symmetry of substantially the same value 2 impedance matching when connecting one electric circuit to another or a component to another or one electric circuit to a component the electric energy is supplied most efficiently from the signal source to the load if the signal source impedance and the load impedance are the same if these

note s0leasereadratingand 54 forstorageandoperating rating solderingandmounting handlinginthiscatalogtopreventsmokingandorburning etc s4hiscataloghasonlytypicalspecifications4herefore pleaseapproveourproductspecificationsortransacttheapprovalsheetforproductspecificationsbeforeordering p11e-2.pdf aug.20,2012 5 features of cerafil® 1 ease of highly selective-design by virtue of employing a mechanical vibration means cerafil® has a high q compared with ift and therefore a high selectivity is obtained just one cerafil® equals the selectivity available with 2 or 3 ifts it also has a remarkable frequency temperature coefficient high selectivity and high stability 2 no peaking needed because cerafil® is employing a mechanical resonance it is almost unaffected by the surrounding circuits its characteristics do not deviate when it is implanted in the printed circuit and no adjustment is required 3 a very suitable component for miniaturization cerafil® is available in various forms for

note s0leasereadratingand 54 forstorageandoperating rating solderingandmounting handlinginthiscatalogtopreventsmokingandorburning etc s4hiscataloghasonlytypicalspecifications4herefore pleaseapproveourproductspecificationsortransacttheapprovalsheetforproductspecificationsbeforeordering p11e-2.pdf aug.20,2012 how to use cerafil® 6 2 countermeasure for spurious response the question of spurious response arises by the fact that resonance occurs under alien vibrating mode or overtone except the basic vibration because cerafil® uses mechanical vibration mode with ceramic filter such as 10.7 mhz 4.5 mhz etc the spurious is not great enough to cause serious a problem since these types use a trapped energy vibration mode but a countermeasure against the spurious is required for the 455 khz filter the following countermeasures are available 1 it is recommended to use supplementary ift together with cerafil® for suppression of spurious 2 arranging 2 or more cerafil® for mutual cancellation

note s0leasereadratingand 54 forstorageandoperating rating solderingandmounting handlinginthiscatalogtopreventsmokingandorburning etc s4hiscataloghasonlytypicalspecifications4herefore pleaseapproveourproductspecificationsortransacttheapprovalsheetforproductspecificationsbeforeordering p11e-2.pdf aug.20,2012 7 discriminator 2 detection methods 1 ratio detection ratio detection is the most popular method in use at present let us introduce its simple operating principle as shown in fig 5-1 the voltage e1 and e2 applied to the diode d1 and d2 are composed of both the primary voltage v1 and a half of the secondary voltage v2 the voltage e1 and e2 are expressed in the equations as shown in fig 5-1 b by this high frequency voltage the rectified current l1 of diode d1 has voltage e1 generated at both ends of c3 and voltage e2 as well as e1 occurs at both ends of c4 moreover the voltage of both ends of r3 and r4 becomes e1+e2 2 since the voltage e1+e2 takes place at both ends of r3 and r4 by

note s0leasereadratingand 54 forstorageandoperating rating solderingandmounting handlinginthiscatalogtopreventsmokingandorburning etc s4hiscataloghasonlytypicalspecifications4herefore pleaseapproveourproductspecificationsortransacttheapprovalsheetforproductspecificationsbeforeordering p11e-2.pdf aug.20,2012 8 ceramic discriminator application in this chapter we will illustrate four applied circuits using our ceramic discriminator and their characteristic data they will be useful as circuits in small radios vics rke and so forth the advantage to this is that adjustment is not required in the if stage including the detection stage our murata s product manager will be happy to recommend the appropriate ceramic discriminator for use with your chosen ic !cdscb10m7ga105a-r0 applications small radios headphone stereos etc vcc 3.0v 10 100 48 47 46 45 44 43 42 41 40 39 38 37 1 2 3 4 5 6 7 8 36 35 34 33 32 !cdscb10m7ga113-r0 applications small radios headphone stereos etc vcc 1.2v 0.01

note s0leasereadratingand 54 forstorageandoperating rating solderingandmounting handlinginthiscatalogtopreventsmokingandorburning etc s4hiscataloghasonlytypicalspecifications4herefore pleaseapproveourproductspecificationsortransacttheapprovalsheetforproductspecificationsbeforeordering p11e-2.pdf aug.20,2012 9 trap 1 trap as mentioned above ceramic filters pass only a particular frequency however a band eliminate filter b e f which blocks or attenuates a particular frequency is called a trap a sound trap for tv set is one famous example of b e f in a tv set a video signal is used in picture amplitude circuit after a video signal detection block a ceramic resonator is insert here and a trap circuit is formed in order to eliminate the sound signal involved in the video signal 2 ceramic trap three-terminal ceramic trap a three-terminal ceramic trap has a monolith structure formed from 2 ceramic resonators fig 6-1 shows a measurement circuit of a three-terminal ceramic trap 4.5mhz band

note s0leasereadratingand 54 forstorageandoperating rating solderingandmounting handlinginthiscatalogtopreventsmokingandorburning etc s4hiscataloghasonlytypicalspecifications4herefore pleaseapproveourproductspecificationsortransacttheapprovalsheetforproductspecificationsbeforeordering p11e-2.pdf aug.20,2012 10 appendix ic manufacturer sony ic part number cx1691m cx-20029 cxa1111 cxa1238 cxa1238n cxa1343m cxa1376am cxa1538m/n/s cxa1611 cxa3067m rsuffix number 078 001 093 027 027n 032 054 069 075 076 119 122 112 109 031 033 045 050 057 082 080 080a 077 092 092d 102 100a 100 113 116 072 107 008 006 016 018 t.i toko trf6901 tk14570l tk14583v tk14588v toshiba ta2003 ta2007n ta2008a/an ta2022 ta2057 ta2099n ta2104afn ta2104f ta2111n/f/fn ta2132 ta2132bp ta2142fn ta2149an ta2149n ta2154fn ta2159f ta31161 ta31272f ta7303p 10 ta7640ap ta8122an/af ta8132an/af

note s0leasereadratingand 54 forstorageandoperating rating solderingandmounting handlinginthiscatalogtopreventsmokingandorburning etc s4hiscataloghasonlytypicalspecifications4herefore pleaseapproveourproductspecificationsortransacttheapprovalsheetforproductspecificationsbeforeordering p11e-2.pdf