CA3130AT INTERSIL [Intersil Corporation], CA3130AT Datasheet - Page 13

• Manufacturer Part Number: CA3130AT
• Description: 15MHz, BiMOS Operational Amplifier with MOSFET Input/CMOS Output
• Manufacturer: INTERSIL [Intersil Corporation]

The heart of the frequency-determining system is an
operational-transconductance-amplifier (OTA) (see Note 10),
lC
output, I
capacitor, C
a CA3130, to provide the triangular-wave output.
Potentiometer R
symmetry of positive-going and negative-going signal
excursions.
Another CA3130, IC
the excursion limits of the triangular output from the
integrator circuit. Capacitor C
optimize the high-frequency square-wave performance of
the circuit.
Potentiometer R
symmetry” of the square-wave output signals. Output from
the threshold detector is fed back via resistor R
of lC
in generating the linear triangular wave.
Operation with Output-Stage Power-Booster
The current-sourcing and-sinking capability of the CA3130
output stage is easily supplemented to provide power-boost
capability. In the circuit of Figure 17, three CMOS transistor-
pairs in a single CA3600E (see Note 12) lC array are shown
parallel connected with the output stage in the CA3130. In
the Class A mode of CA3600E shown, a typical device
consumes 20mA of supply current at 15V operation. This
arrangement boosts the current-handling capability of the
CA3130 output stage by about 2.5X.
The amplifier circuit in Figure 17 employs feedback to
establish a closed-loop gain of 48dB. The typical large-signal
bandwidth (-3dB) is 50kHz.
NOTE:
Intersil semiconductor products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time with-
out notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
9. See file number 619 for technical information.
1
, operated as a voltage-controlled current-source. The
All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification.
1
so as to toggle the current source from plus to minus
O
, is a current applied directly to the integrating
1
, in the feedback loop of the integrator lC
2
3
is used to adjust the circuit for slope
is adjustable to perfect the “amplitude
3
, is used as a controlled switch to set
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13
2
is a “peaking adjustment” to
4
to the input
CA3130, CA3130A
2
, using
FREQUENCY RANGE:
100k
100k
FIGURE 15. PULSE GENERATOR (ASTABLE MULTIVIBRATOR)
R
R
1
2
ON-PERIOD
1 F
WITH PROVISIONS FOR INDEPENDENT CONTROL
OF “ON” AND “OFF” PERIODS
R
100k
POSITION OF S
ADJUST
3
0.1 F
1M
2k
0.01 F
0.001 F
0.01 F
S
0.1 F
1
1 F
+15V
1
3
2
OFF-PERIOD
0.001 F
2k
ADJUST
PULSE PERIOD
4 s to 1ms
40 s to 10ms
0.4ms to 100ms
4ms to 1s
1M
CA3130
+
-
7
4
2k
6
OUTPUT
0.01 F