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參數(shù)資料
| 型號(hào)： | 5962-9098701QEA |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類(lèi)： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 10 MHz, CDIP16 |
| 封裝： | CERAMIC, DIP-16 |
| 文件頁(yè)數(shù)： | 1/9頁(yè) |
| 文件大?。?/td> | 595K |
| 代理商： | 5962-9098701QEA |
4/97
Precision Phase Locked Frequency
Control System
Crystal Oscillator
Programmable Reference Frequency
Dividers
Phase Detector with Absolute Frequency
Steering
Digital Lock Indicator
Double Edge Option on the Frequency
Feedback Sensing Amplifier
Two High Current Op-Amps
5V Reference Output
Phase Locked Frequency Controller
UC1633
UC2633
UC3633
FEATURES
The UC1633 family of integrated circuits was designed for use in phase
locked frequency control loops. While optimized for precision speed
control of DC motors, these devices are universal enough for most ap-
plications that require phase locked control. A precise reference fre-
quency can be generated using the device’s high frequency oscillator
and programmable frequency dividers. The oscillator operates using a
broad range of crystals, or, can function as a buffer stage to an external
frequency source.
The phase detector on these integrated circuits compares the refer-
ence frequency with a frequency/phase feedback signal. In the case of
a motor, feedback is obtained at a hall output of other speed detection
device. This signal is buffered by a sense ampilfier that squares up the
signal as it goes into the digital phase detector. The phase detector re-
sponds proportionally to the phase error between the reference and the
sense amplifier output. This phase detector includes absolute fre-
quency steering to provide maximum drive signals when any frequency
error exists. This feature allows optimum start-up and lock times to be
realized.
Two op-amps are included that can be configured to provide necessary
loop filtering. The outputs of the op-amps will source or sink in excess
of 16mA, so they can provide a low impedence control signal to driving
circuits.
Additional features include a double edge option on the sense amplifier
that can be used to double the loop reference frequency for increased
loop bandwidths. A digital lock signal is provided that indicates when
there is zero frequency error, and a 5V reference output allows DC op-
erating levels to be accurately set.
DESCRIPTION
BLOCK DIAGRAM
1
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