HA17741/PS
30
C
T1
= 102 pF
C
T2
= 99 pF
C
1
= 106 pF
V
CC
=
−V
EE
= 15 V
R
T1
= 150 kΩ, R
T2
= 150 kΩ
R
1
= 151.2 kΩ
R
11
= 15 kΩ, R
22
= 10 kΩ
R
33
= 15 kΩ, R
44
= 10 kΩ
C
T1
, C
T2
, C
1
→
1,000 pF
Use a Mylar capacitor.
With V
OP-P
= 21 V
P-P
and
R
22
= R
44
= 10 kΩ
the frequency of the sine
wave will be under 10 kHz.
Sin out
Cos out
10
3
1.0
0.3
0.1
0.03
0.01
100 p
1,000 p
0.01
µ
0.1
µ
C
T1
, C
T2
, C
1
(F)
Figure 11 HA17741 Quadrature Sine Wave Oscillator
f−C
T1
, C
T2
, C
1
Characteristics
Vertical:
5 V/div
Horizontal: 0.2 ms/div
Circuit constants
C
T1
= 1000 pF (990), C
T2
= 1000 pF (990)
R
T1
= 150 kΩ, R
T2
= 150 kΩ
C
1
= 1000 pF (990), R
1
= 160 kΩ
R
11
= 15 kΩ, R
22
= 10 kΩ
R
33
= 16 V, R
44
= 10 kΩ
V
CC
= 15 V, V
EE
=
−15
V
←
Sin out
0
←
Cos out
Figure 12 Sine and Cosine Output Waveforms
Triangular Wave Generator
Integrator
D
1
R
3
−
A1
D
2
R
4
+
R
1
V
A
+
Vout2
A2
−
R
1
/R
2
Vout1
C
R
2
Hysteresis comparator
Figure 13 Triangular Wave Generator Operating Circuit
8
HITACHI [ HITACHI SEMICONDUCTOR ]
