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參數資料
| 型號： | CA3130S |
| 英文描述： | TRANSIL |
| 中文描述： | 電壓反饋運算放大器 |
| 文件頁數： | 10/15頁 |
| 文件大?。?/td> | 617K |
| 代理商： | CA3130S |
2-117
CA3130, CA3130A
(A) OUTPUT-WAVEFORM WITH INPUT-SIGNAL RAMPING (2V/
DIV. AND 500
μ
s/DIV.)
Top Trace:
Bottom Trace:
Output (5V/DIV. and 200
μ
s/DIV.)
Input Signal (5V/DIV. and 200
μ
s/DIV.)
(B) OUTPUT WAVEFORM WITH GROUND-REFERENCE SINE-
WAVE INPUT
FIGURE 16. SINGLE-SUPPLY VOLTAGE-FOLLOWER WITH
ASSOCIATED WAVEFORMS. (e.g., FOR USE IN SIN-
GLE-SUPPLY D/A CONVERTER; SEE FIGURE 9 IN
AN6080)
3
2
8
1
4
7
6
+
-
10k
56pF
OFFSET
ADJUST
+15V
0.01
μ
F
2k
0.1
μ
F
5
100k
9-Bit COS/MOS DAC
A typical circuit of a 9-bit Digital-to-Analog Converter (DAC)*
is shown in Figure 17 This system combines the concepts of
multiple-switch CMOS lC's, a low-cost ladder network of dis-
crete metal-oxide-film resistors, a CA3130 op-amp con-
nected as a follower, and an inexpensive monolithic
regulator in a simple single power-supply arrangement. An
additional feature of the DAC is that it is readily interfaced
with CMOS input logic, e.g., 10-volt logic levels are used in
the circuit of Figure 17.
The circuit uses an R/2R voltage-ladder network, with the
output potential obtained directly by terminating the ladder
arms at either the positive or the negative power-supply ter-
minal. Each CD4007A contains three “inverters”, each
“inverter” functioning as a single-pole double-throw switch to
terminate an arm of the R/2R network at either the positive
or negative power-supply terminal. The resistor ladder is an
assembly of one percent tolerance metal-oxide film resistors.
The five arms requiring the highest accuracy are assembled
with series and parallel combinations of 806,000-ohm resis-
tors from the same manufacturing lot.
A single 15-volt supply provides a positive bus for the
CA3130 follower amplifier and feeds the CA3085 voltage
regulator. A “scale-adjust” function is provided by the regula-
tor output control, set to a nominal 10-volt level in this sys-
tem. The line-voltage regulation (approximately 0.2%)
permits a 9-bit accuracy to be maintained with variations of
several volts in the supply. The flexibility afforded by the
COS/MOS building blocks simplifies the design of DAC sys-
tems tailored to particular needs.
Single-Supply, Absolute-Value, Ideal Full-Wave Rectifier
The absolute-value circuit using the CA3130 is shown in Figure
18. During positive excursions, the input signal is fed through
the feedback network directly to the output. Simultaneously, the
positive excursion of the input signal also drives the output ter-
minal (No. 6) of the inverting amplifier in a negative-going
excursion such that the 1N914 diode effectively disconnects the
amplifier from the signal path. During a negative-going excur-
sion of the input signal, the CA3130 functions as a normal
inverting amplifier with a gain equal to -R2/R1. When the equal-
ity of the two equations shown in Figure 18 is satisfied, the full-
wave output is symmetrical.
Peak Detectors
Peak-detector circuits are easily implemented with the
CA3130, as illustrated in Figure 19 for both the peak-positive
and the peak-negative circuit. It should be noted that with
large-signal inputs, the bandwidth of the peak-negative cir-
cuit is much less than that of the peak-positive circuit. The
second stage of the CA3130 limits the bandwidth in this
case. Negative-going output-signal excursion requires a pos-
itive-going signal excursion at the collector of transistor Q11,
which is loaded by the intrinsic capacitance of the associ-
ated circuitry in this mode. On the other hand, during a neg-
ative-going signal excursion at the collector of Q11, the
transistor functions in an active “pull-down” mode so that the
intrinsic capacitance can be discharged more expeditiously.
相關PDF資料 |
PDF描述 |
|---|---|
| CA3130S3 | TRANSIL |
| CA3130SX | TRANSIL |
| CA3138 | High-Current, High-Beta N-P-N Transistor Arrays |
| CA3138A | High-Current, High-Beta N-P-N Transistor Arrays |
| CA3160BT | Operational Amplifier |
相關代理商/技術參數 |
參數描述 |
|---|---|
| CA3130S3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
| CA3130SX | 制造商:Harris Corporation 功能描述: 制造商:Intersil Corporation 功能描述: |
| CA3130T | 制造商:RCA 功能描述: |
| CA3138 | 制造商:GESS 制造商全稱:GESS 功能描述:High-Current, High-Beta N-P-N Transistor Arrays |
| CA3138A | 制造商:GESS 制造商全稱:GESS 功能描述:High-Current, High-Beta N-P-N Transistor Arrays |
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