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| 型号： | 5962-9098701Q2A |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 10 MHz |
| 文件页数： | 7/9页 |
| 文件大小： | 595K |
| 代理商： | 5962-9098701Q2A |
Design Example
UC1633
UC2633
UC3633
Bode Plots - Design Example Open Loop Response
1.)
KLF(s)
KRF(s)
2.*)
N
Kφ GPD KT
s
2
J
3.) Combined Overall Open Loop Response
Where:
KLF(s) = Loop Filter Response
KRF(s) = Reference Filter Response
N = 4 (Using Double Edge Sensing With 4 Pole
Motor)
K
φ = Phase Detector Gain (.4V/RAD)
GPD = Power Stage Transductance (1A/V)
KT = Motor Torque Constant (.022NM/A)
J = Motor Moment of Inertia (.0015NM/A - SEC
2)
s = 2
πjf
*Note: For a current mode driver the electrical time constant, LM / RM, of the motor does not enter into the small signal response.
If a voltage mode drive scheme is used, then the asymptote, plotted as 2 above, can be approximated by:
N
K φ
KPD KT
s
2 J RM
if: RM > KT
√LM
J
and,
KT
2
π
J RM
<
f <
RM
2
π LM
Here: KPD = Voltage gain of Driver Stage
RM = Motor Winding Resistance
LM = Motor Winding Inductance
APPLICATION AND OPERATION INFORMATION
UNITRODE CORPORATION
7 CONTINENTAL BLVD.
MERRIMACK, NH 03054
TEL. (603) 424-2410
FAX (603) 424-3460
7
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