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CA5160 データシート(PDF) 10 Page - Intersil Corporation

部品番号 CA5160
部品情報  4MHz, BiMOS Microprocessor Operational Amplifier with MOSFET Input/CMOS Output
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メーカー  INTERSIL [Intersil Corporation]
ホームページ  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

CA5160 データシート(HTML) 10 Page - Intersil Corporation

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10
Precision Voltage-Controlled Oscillator
The circuit diagram of a precision voltage-controlled
oscillator is shown in Figure 10. The oscillator operates with
a tracking error on the order of 0.02% and a temperature
coefficient of 0.01%/oC. A multivibrator (A1) generates
pulses of constant amplitude (V) and width (T2). Since the
output (Terminal 6) of A1 (a CA5130) can swing within about
10mV of either supply-rail, the output pulse amplitude (V) is
essentially equal to V+. The average output voltage
(EAVG =V T2/T1) is applied to the non-inverting input
terminal of comparator A2 (a CA5160) via an integrating
network R3, C2. Comparator A2 operates to establish circuit
conditions such that EAVG = V1. This circuit condition is
accomplished by feeding an output signal from Terminal 6 of
A2 through R4, D4 to the inverting terminal (Terminal 2) of
A1, thereby adjusting the multivibrator interval, T3.
Voltmeter With High Input Resistance
The voltmeter circuit shown in Figure 11 illustrates an
application in which a number of the CA5160 characteristics
are exploited. Range-switch SW1 is ganged between input
and output circuitry to permit selection of the proper output
voltage for feedback to Terminal 2 via 10k
Ω current-limiting
resistor. The circuit is powered by a single 8.4V mercury
battery. With zero input signal, the circuit consumes
somewhat less than 500
µA plus the meter current required
to indicate a given voltage. Thus, at full-scale input, the total
supply current rises to slightly more than 1500
µA.
6
7
3
4
2
+15V
0.01
µF
10k
+
-
0.1
µF
1
5
2k
OFFSET
ADJUST
100k
FIGURE 7A. SINGLE SUPPLY FOLLOWER
0
FIGURE 7B. OUTPUT SIGNAL WITH INPUT SIGNAL RAMPING
0
0
Top Trace: Output
Bottom Trace: Input
FIGURE 7C. OUTPUT-WAVEFORM WITH GROUND-
REFERENCE SINE-WAVE INPUT
FIGURE 7. SINGLE SUPPLY VOLTAGE FOLLOWER WITH
ASSOCIATED WAVEFORMS (e.g., FOR USE IN
SINGLE-SUPPLY D/A CONVERTER; SEE FIGURE 9
IN AN6080)
CA5160


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同様の説明 - CA5160

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