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MC145156P2 데이터시트(PDF) 8 Page - Motorola, Inc |
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MC145156P2 데이터시트(HTML) 8 Page - Motorola, Inc |
8 / 36 page MC145151–2 through MC145158–2 MOTOROLA 8 Figure 2. 666–Channel, Computer–Controlled, Mobile Radiotelephone Synthesizer for 800 MHz Cellular Radio Systems LOCK DETECT SIGNAL R1 + RECEIVER FIRST L.O. 825.030 → 844.980 MHz (30 kHz STEPS) MC12017 ÷ 64/65 PRESCALER NOTE 6 MC145152–2 NOTE 5 MC LD A0 A5 N9 OSCin VDD VSS OSCout RA2 RA1 φR φV fin – VCO RA0 N0 + V R1 R2 C R2 C “1” “1” “1” NO CONNECTS CHANNEL PROGRAMMING NOTES: 1. Receiver 1st I.F. = 45 MHz, low side injection; Receiver 2nd I.F. = 11.7 MHz, low side injection. 2. Duplex operation with 45 MHz receiver/transmit separation. 3. fR = 7.5 kHz; ÷ R = 2048. 4. Ntotal = N 64 + A = 27501 to 28166; N = 429 to 440; A = 0 to 63. 5. MC145158–2 may be used where serial data entry is desired. 6. High frequency prescalers (e.g., MC12018 [520 MHz] and MC12022 [1 GHz]) may be used for higher frequency VCO and fref implementations. 7. The φR and φV outputs are fed to an external combiner/loop filter. See the Phase–Locked Loop — Low–Pass Filter Design page for additional information. The φR and φV outputs swing rail–to–rail. Therefore, the user should be careful not to exceed the common mode input range of the op amp used in the combiner/loop filter. REF. OSC. 15.360 MHz (ON–CHIP OSC. OPTIONAL) X2 X4 NOTE 6 X4 NOTE 6 TRANSMITTER MODULATION TRANSMITTER SIGNAL 825.030 → 844.980 MHz (30 kHz STEPS) RECEIVER 2ND L.O. 30.720 MHz NOTE 7 MC145152–2 Data Sheet Continued on Page 23 |
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