参数资料
型号: MC44BS373CAEFR2
厂商: Freescale Semiconductor
文件页数: 20/52页
文件大小: 0K
描述: IC AUD/VID PAL MODULATOR 16-SOIC
标准包装: 1
类型: NTSC/PAL 调制器
应用: 音频/视频,VCR,机顶盒
安装类型: 表面贴装
封装/外壳: 16-SOIC(0.154",3.90mm 宽)
供应商设备封装: 16-SOIC N
包装: 剪切带 (CT)
其它名称: MC44BS373CAEFR2CT
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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