參數(shù)資料
型號(hào)： AN-242
廠商： National Semiconductor Corporation
英文描述： LJT 18C 18#20 SKT RECP
中文描述： 應(yīng)用新的精密運(yùn)算放大器
文件頁(yè)數(shù)： 14/16頁(yè)
文件大?。?/td> 267K
代理商： AN-242
peak detector
The peak detector inFigure 24 expands upon this idea. Iso-
lation is used on both the peak-detecting diode and the re-
set switch. This particular circuit is designed for a long hold
interval so acquisition is not quick. As might be expected
from an examination of the figure, frequency compensation
of an op amp peak detector is not exactly straightforward.
oven controller
The LM11 is quite useful with slow servo systems because
impedance levels can be raised to where reasonable capac-
itor values can be used to effect loop stabilization without
affecting accuracty. An example of this is shown in Figure
25. This is a true proportional controller for a crystal oven.
300
m
s min single pulse
2
required if Q1 has gate-
protection diode
*
polystyrene or Teflon
200
m
s min repetitive pulse
300 Hz max sine wave error
k
5 mV
TL/H/7479–26
Figure 24. A peak detector designed for extended hold. Leakage currents of peak-detecting diodes and reset switch
are absorbed before reaching storage capacitor.
*
solid tantalum
TL/H/7479–27
2
mylar
3
close thermal coupling between sensor and oven shell is recommended.
FIGURE 25. Proportional control crystal oven heater uses lead/lag compensation for fast settling. Time constant is
changed with R4 and compensating resistor R5. If Q2 is inside oven, a regulated supply is recommended
for 0.1
§
C control.
14
相關(guān)PDF資料
PDF描述
AN-40 Application Note 40
AN-5002 LJT 18C 18#20 SKT WALL RECP
AN-5025 Applications Using the GTLP10B320
AN-5026 Circular Connector; No. of Contacts:19; Series:MS27656; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Pin; Circular Shell Style:Wall Mount Receptacle; Insert Arrangement:15-19 RoHS Compliant: No
AN-5031 GTLP Power Configuration
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