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參數資料
型號: MC44BS373CAEF
廠商: Freescale Semiconductor
文件頁數: 20/52頁
文件大小: 0K
描述: AUDIO VIDEO INTERGRATION MOD
標準包裝: 48
類型: NTSC/PAL 調制器
應用: 音頻/視頻,VCR,機頂盒
安裝類型: 表面貼裝
封裝/外殼: 16-SOIC(0.154",3.90mm 寬)
供應商設備封裝: 16-SOIC N
包裝: 管件
MC44BS373CA Data Sheet
High Speed I2C Compatible Bus
Figure 10. PLL Loop Filter
Loop filter equation:
ωo = 3-dB cutoff frequency
Kpd = 1-
A phase detector current
Kosc = 5 MHz/V sound oscillator slope. (In fact, Kosc = 40 MHz/prescaler divider = 8.) This
provides 5 MHz/V.
N = Sound divider ratio
Q = quality factorvR
C2, added to minimize glitches, is usually set to one tenth the size of C1. For example:
Fref = 31.25 kHz
→ N = 5.5 MHz / 31.25 kHz = 176
Assuming C1 = 1
F, then
ωo = 168 rad, and Fo = 27 Hz
Q depends on the desired frequency response. Choosing Q = 0.7 as a starting point, then R = 8.5 K
. The
resistance acts directly on the factor quality and can be adjusted to create a peak on the low-frequency range.
It is recommended that the value of R be adjusted experimentally depending on the application and
requirements.
16 High Speed I2C Compatible Bus
16.1 Specification Conditions
Each of the characteristics listed in Table 27 and Table 28 is classified as one of the following types:
A—100% tested
B—100% correlation tested
C—Characterized on samples
D—Design parameter
Unless otherwise specified, VCC = 5.0 V, TA = 25°C.
C2
C1
R
ωo
Kpd
Kosc
×
NC1
×
------------------------------
=
Q
1
RC1
×
ωo
×
-------------------------------
=
with
,,
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