參數(shù)資料
型號(hào)： 74HCT7046A
廠商： NXP Semiconductors N.V.
英文描述： Phase-locked-loop with lock detector(帶鎖檢測(cè)的鎖相環(huán))
中文描述： 鎖相回路探測(cè)器與鎖（帶鎖檢測(cè)的鎖相環(huán)）
文件頁(yè)數(shù)： 33/38頁(yè)
文件大?。?/td> 490K
代理商： 74HCT7046A
December 1990
33
Philips Semiconductors
Product specification
Phase-locked-loop with lock detector
74HC/HCT7046A
APPLICATION INFORMATION
Lock-detection circuit
The built-in lock-detection circuit will only work when used
in conjunction with the phase comparator PC2. The
lock-indication is derived from the phase error between
SIG
IN
and COMP
IN
. The PC2 has a typical phase error of
zero degrees over the entire VCO operating range.
However, to remain in-lock the circuit requires some small
adjustments. The variation is dependent on the loop
parameters and back-lash time (typically 5 ns). Depending
on the application, the phase error can be defined as the
limit, a phase error of greater magnitude would be
considered out-of-lock. An example of an in-lock detection
circuit using the “7046A” is shown in Fig.30.
If the PLL is in-lock, only very small pulses will come from
the “up” or “down” connections of PC2. These pulses are
filtered out by a RC network. A Schmitt trigger produces a
steady state level, a HIGH level indicates an in-lock
condition and a pulsed output indicates an out-of-lock
condition as shown in Fig.31.
Fig.30 An example of an in-lock detection circuit using the “7046A”.
See Fig.31 for input waveform.
Fig.31 Waveforms showing the lock detection process; (a) in-lock; (b) out-of-lock.
(a)
(b)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
74HCT7046AD 功能描述:鎖相環(huán) - PLL PHASED-LOCKED LOOP W/LOCK DTCT RoHS:否 制造商:Silicon Labs 類(lèi)型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray
74HCT7046AD,112 功能描述:鎖相環(huán) - PLL PHASED-LOCKED LOOP RoHS:否 制造商:Silicon Labs 類(lèi)型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray
74HCT7046AD,118 功能描述:鎖相環(huán) - PLL PHASED-LOCKED LOOP RoHS:否 制造商:Silicon Labs 類(lèi)型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray
74HCT7046AD/AUJ 制造商:NXP Semiconductors 功能描述:74HCT7046AD/SO16/REEL13//AU - Tape and Reel 制造商:NXP Semiconductors 功能描述:IC PLL W/LOCK DETECTOR 16SOIC
74HCT7046AD-T 功能描述:鎖相環(huán) - PLL PHASED-LOCKED LOOP W/LOCK DTCT RoHS:否 制造商:Silicon Labs 類(lèi)型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray
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