 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
MC13109A Datasheet(PDF) 22 Page - Motorola, Inc |
|
|
|||||||||||||||||||||||||||||
MC13109A Datasheet(HTML) 22 Page - Motorola, Inc |
|
|
22 / 28 page  MC13109A 22 MOTOROLA RF/IF DEVICE DATA Auxiliary Register The auxiliary register contains a 3–Bit 1st LO Capacitor Selection latch and a 4–Bit Test Mode latch. Operation of these latch bits are explained in Figures 24, 25 and 26. Figure 24. Auxiliary Register Latch Bits 4–Bit Test Mode 3–Bit 1st LO Capacitor Selection MSB LSB MSB LSB First Local Oscillator Capacitor Selection for 25 Channel U.S. Operation There is a very large frequency difference between the minimum and maximum channel frequencies in the proposed 25 Channel U.S. standard. The sensitivity of the 1st LO is not large enough to accommodate this large frequency variation. Fixed capacitors can be connected across the 1st LO tank circuit to change the 1st LO sensitivity. Internal switches and capacitors are provided to enable microprocessor control over internal fixed capacitor values. Figure 25 shows the schematic of the 1st LO tank circuit. Figure 26 shows the latch control bit values. Figure 25. First LO Schematic LO1 In 40 LO1 Out 41 Vcap Ctrl 42 Internal Capacitor 1st LO Varactor Varactor Cext Lext Figure 26. 1st LO Capacitor Select for U.S. 25 Channels 1st LO Cap. Bit 2 1st LO Cap. Bit 1 1st LO Cap. Bit 0 1st LO Cap. Select U.S. Base Channels U.S. Handset Channels Varactor Value over 0.5 to 2.2 V Range External Capacitor Value External Inductor Value 0 0 0 0 16 – 25 – 10 – 6.4 pF 27 pF 0.47 µH 0 0 0 0 – 16 – 25 10 – 6.4 pF 33 pF 0.47 µH 0 0 1 1 1 – 6 – 10 – 6.4 pF 27 pF 0.47 µH 0 1 0 2 7 – 15 – 10 – 6.4 pF 27 pF 0.47 µH 0 1 1 3 – 1 – 6 10 – 6.4 pF 33 pF 0.47 µH 1 0 0 4 – 7 – 15 10 – 6.4 pF 33 pF 0.47 µH |
Similar Part No. - MC13109A |
|
Similar Description - MC13109A |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
