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TL052ACP Fiches technique(PDF) 56 Page - Texas Instruments

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No de pièce TL052ACP
Description  ENHANCED-JFET LOW-OFFSET OPERATIONAL AMPLIFIERS
Download  65 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

TL052ACP Fiches technique(HTML) 56 Page - Texas Instruments

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TL05x, TL05xA, TL05xY
ENHANCED-JFET LOW-OFFSET
OPERATIONAL AMPLIFIERS
SLOS178 – FEBRUARY 1997
56
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
phase meter
The phase meter in Figure 84 produces an output voltage of 10 mV per degree of phase delay between the two
input signals VA and VB. The reference signal VA must be the same frequency as VB. The TLC3702 comparators
(U1) convert these two input sine waves into
±5-V square waves. Then R1 and R4 provide level shifting prior
to the SN74HC109 dual J-K flip flops.
Flip-flop U2B is connected as a toggle flip-flop and generates a square wave at half the frequency of VB.
Flip-flop U2A also produces a square wave at half the input frequency. The pulse duration of U2A varies from
zero to half the period, where zero corresponds to zero phase delay between VA and VB and half the period
corresponds to VB lagging VA by 360 degrees.
The output pulse from U2A causes the TLC4066 (U3) switch to charge the TL05x (U4) integrator capacitors C1
and C2. As the phase delay approaches 360 degrees, the output of U4A approximates a square wave and U2A
has an output of almost 2.5 V. U4B acts as a noninverting amplifier with a gain of 1.44 in order to scale the
0- to 2.5-V integrator output to a 0- to 3.6-V output range.
R8 and R10 provide output gain and zero-level calibration. This circuit operates over a 100-Hz to 10-kHz
frequency range.
+
+
+ 5 V
R2
100 k
R1
100 k
U1A
VA
S
1J
C1
U2A
1K
R
NC
U2B
2K
R3
VB
U1B
R6
10 k
R7
10 k
+ 5 V
S
2J
C1
R
NC
100 k
R4
100 k
U3
R5
C1
10 k
0.016
µF
C2
0.016
µF
U4A
U4B
VO
R9
20 k
R8
Gain
50 k
+ 5 V
R10
10 k
Zero
– 5 V
NOTE A: U1 = TLC3702; VCC
± = ±5 V
U2 = SN74HC109
U3 = TLC4066
U4, U5 = TL05x; VCC
± = ±5 V
Figure 84. Phase Meter


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