调频收音机设计.doc

sonycxa1019sfmbu2614mcs-51 the design of digital frequency modulation tunersynthesizing technology to form the electric parts of the frequencymodulation tuner. this tuner owns the functions of tuning and selectingchannels, searching, storing and so on. in my paper, i emphasized on thefm frequency tuning circuit that consists of the ics cxa1019s fromsony corp., the phase locking loop circuit formed by bu2614 pllfrequency synthesizer, mcs51 monolithic processor and the other circuitsof keyboards, screen and storage.keyword:frequency tuning, oscillating frequency by itself, phase locking loop,frequency synthesizer, monolithic processor. 21. fm88mhz108mhz2. 100hz15000hz75khz3. 100mw84. 1mw5. 20db6. sonyfm/amcxa1019sbu2614mcs-512.1 bu2614bu2614cxa1019svcoat89c52max721993c46-1310.7mcxa1019svcovcobu2614at89c5293c46 -12.2 1 cxa1019sfmvcc=5v5.3mavcc=6rl=8500mw2 fm88m108mhz,110mhzmc145151mc145157mc14515830mhz100mhzmc12009mc12013rohmbu2614130mhzrfif3 81558279p0p24maxim8max72196at89c524 5 eeprom2764a2864aeepromeepromeepromeeprom 93c466 watchdogwatchdogwatchdogwatchdogwatchdogcpu7 bu2614cxa1019s5v9v+5vdcdc+12v 3.1 cxa1019s88mhz108mhzcxa1019scxa1019sam-2515fm/am out14fe gnd13fm rf in12nc10fm rf9reg out8fm osc7afc6am osc5vol11am rf4nf3discr12gnd1gnd16band17am if in18fm if in19nc20meter21if gnd22afc/agc24det out23afc/agc25af in26ripple27vcc28af out29gnd30gndcxa1019sr615010.7mhz10.7mhzr1330c30.01ufr27. 2ke710ufe68. 7ufe510ufe40.47ufe310ufe2470ufc100.1ufc10.1ufc20.22uf+5ve110ufls?speakere99. 7ufr510krv150kc93pfvd2c81000pfc715pfc40.01ufe810ufc63pfcapvarl2l1c51000pfvd1r4r3100kpmoscbpfvd(2.6v-9.8v)+-2bpfcxa1019s13fm10l1c6c5vd1vd18l2c7c8vd2fmvd210.7mhz15r1330cf10.7mhz18fmfm3dicf10.7mhz24e42528188mhz108mhz,fmax=108mhz,fmin=88mhz,cmaxcmincpx1minmaxcc min2minmaxcccccpxpx6minmaxmin2minmaxminmaxcccccccccpxpx+pxpxcccccc+minmaxminmaxkdkd=minmaxminmaxminccccccffpxpxamx1.52 m-2352.68v9.8v6p15p :c8c7 c(cvdmaxcvdmin) cmax=c7+88maxmaxccccvdvd+=29.78pcmin=c7+88minminccccvdvd+=20.96pkd=7.10887.10108+=1.1 96.2078.29minmax=cc=1.19 kdcd)(210dcclf+=uc2.6v-9.8v13d( n )bu2614nbu2614bu2614(ceckdata)-9d0d1d2d3d4d5 d6d7d8d10d9d11d12d13d14d15p0p1p2*ctr0r2r1sps*gtts*:irrelevantinput done from d0internal datacedackd0d1d2*gttst11mst2t3500ust4100ust515ust1t2t3t4t5-9r0r1r200025khzsfminamin0fm1amfms0bu26140(d0d15)nd0d15 s=1d4d1514d0d1d2d3d4d5d6d7d8d9d10d11d12d13d14d15n=1107d=453h s=0ps=01011100000000001n=1100d/2=550d=226h s=0ps=10110001001000000n=926d=39eh s=1ps=0*01*1110111000s=0ps=0bu26143.3 max721974ls00max72198-10at89c52p3.3p3.4p3.5-103.4 89c52p1.2p1.714a16b20c23d21e15f17g22df2dig011dig16dig27dig34gnd9gnd19181din13clk12load3dig410dig572191234679101112131415161718192021222310k+5vp3.3(8031)p3.4(8031)p3.5(8031)max721910k+5v15p0p2i/op0.6p0.7p2.0p2.410100910p0.0p0.5-11 7*r-1k+5v6m22p22p0123456789+5v6*r-510ea/vp31x119x218reset9rd17wr16int012int113t014t115p101p112p123p134p145p156p167p17