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參數(shù)資料
| 型號(hào)： | KB8821 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | Tantalum Molded Capacitor; Capacitance: 10uF; Voltage: 35V; Case Size: 3.2x6 mm; Packaging: Tape & Reel |
| 中文描述： | 頻率合成器 |
| 文件頁數(shù)： | 10/21頁 |
| 文件大?。?/td> | 237K |
| 代理商： | KB8821 |
PRELIMINARY SPECIFICATION (V1.5)
FREQUENCY SYNTHESIZER
KB8821/22/23
10
99-06-15
FUNCTIONAL DESCRIPTION
The Samsung KB882x are dual PLL frequency synthesizer ICs. KB882x combined with external LPFs andexter-
nal VCOs form PLL frequency synthesizers. They include serial data control, R counter, N counter, prescaler,
phase detector, charge pump, and etc.(Figure 1).
Serial data is moved into 20-bit shift register on the rising edge of the clock(Figure 2). These data enters MSB
first. When LE becomes HIGH, data in the shift register is moved into one of the 4 latches(by the 2-bit control).
The divide ratios of the prescaler and the counters are determined by the data stored in the latches. The external
VCO output signal is divided by the prescaler and the N counter. External reference signal is divided by the R
counter. These two signals are the two input signals to the phase detector. The phase detector drives the charge
pump by comparing frequencies and phases of the above two signals. The charge pump and the external LPF
make the control voltage for the external VCO and finally the VCO generates the appropriate frequency signal.
Serial Data Input Timing
MSB
LSB
N20(R20)
N19(R19)
N10(R10)
N9(R9)
C2
C1
t
DS
t
CWL
t
CWH
t
LEW
t
DH
DATA
CLOCK
LE
t
CLE
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| KB8822 | FREQUENCY SYNTHESIZER |
| KB8825 | 1.1GHZ DUAL PLL |
| KBE00F005A | 512Mb NAND*2 + 256Mb Mobile SDRAM*2 |
| KBE00F005A-D411 | 512Mb NAND*2 + 256Mb Mobile SDRAM*2 |
| KBE00S003M | 1Gb NAND*2 + 256Mb Mobile SDRAM*2 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KB8822 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:FREQUENCY SYNTHESIZER |
| KB8823 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:FREQUENCY SYNTHESIZER |
| KB8825 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:1.1GHZ DUAL PLL |
| KB8C5 | 制造商:IDEC Corporation 功能描述:DISTR. BOX/SIST. DI DISTR. |
| KB8D | 制造商:IDEC Corporation 功能描述:DISTR. BOX/SIST. DI DISTR. |
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