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參數資料
型號: HT9015
廠商: Holtek Semiconductor Inc.
英文描述: RF Single Chip for Cordless Phone
中文描述: 射頻單芯片無繩電話
文件頁數: 14/23頁
文件大小: 206K
代理商: HT9015
HT9015
14
April 10, 2000
Preliminary
Example of divider setting
When the LOCAL OSC frequency is 10.240MHz, RX VCO has to oscillate at frequencies from
35.915MHz in 20kHz or 25kHz step.
Reference frequency at the PHASE DETECTOR should be set to 5kHz.
10.240MHz
5kHz = 2048,
R= 2048
Calculate dividing number N for RX divider
35.915MHz
5kHz = 7183,
N (CH16)= 7183
35.935MHz
5kHz = 7187,
N (CH17)= 7187
Finally you set the following registers.
The power saving arrangement is one of the features in the HT9015.
This is achieved through an inside control register to arrange the power consumption of the three
major parts (RF. IF. PLL). There are two-pair DC power supplies for the HT9015, V
CC1
-GND1 and
V
CC3
-GND2. The DC power V
CC1
provides operating voltage for the IF detector and the compander
analog parts.
The DC power V
CC3
provides the operating voltage for the PLL and data latch control. It also has a
built in 2.0V regulator VCC2 for the RX front end. See the power supply arrangement as shown on
the table below.
VCC1
GND1
1st MIX, 2nd MIX, IF AMP, QUAD, NOISE DET. RX-VCO DATA COMP,
COMPANDER, RECEIVER AMP, SPLATTER.
VCC3
GND2
RX-PLL, TX-PLL, LOCAL OSC, DATA LATCH CONTROL
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