CA3160AE Просмотр технического описания (PDF) - Harris Semiconductor

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производитель

CA3160AE

4MHz, BiMOS Operational Amplifier with MOSFET Input/CMOS Output

Harris Semiconductor 

CA3160, CA3160A

NOTE: A square wave signal modulates the external sweeping input

to produce 1Hz and 1MHz, showing the 1,000,000/1 frequency range

of the Function Generator.

FIGURE 9B. TWO-TONE OUTPUT SIGNAL FROM THE

FUNCTION GENERATOR

NOTE: The bottom trace is the sweeping signal and the top trace is

the actual generator output. The center trace displays the 1MHz signal

via delayed oscilloscope triggering of the upper swept output signal.

FIGURE 9C. TRIPLE-TRACE OF THE FUNCTION GENERATOR

SWEEPING TO 1MHz

FIGURE 9. 1,000,000/1 SINGLE CONTROL FUNCTION GENERATOR: 1Hz to 1MHz

+15V

100 100

kΩ kΩ

1MΩ

+15V

7

3+

100

kΩ

CA3130

6

2-

8

15 - 115pF

FREQ

ADJUST

4

STEP HEIGHT

ADJUST

4 - 60pF

8.2kΩ

1N914

5.1kΩ

1N914

470pF

+15V

STAIRCASE

OUTPUT

+15V

7

2-

CA3160

3+

4

10kΩ

6

+15V

2kΩ

1.5

MΩ

7

3+

CA3130

6

2-

8

4

MULTIVIBRATOR

CHARGE

COMMUTATING

NETWORK

MULTIVIBRATOR RETRACE INHIBIT

INTEGRATOR

HYSTERESIS SWITCH

51kΩ

+15mV TO +10V

100kΩ

FIGURE 10A. STAIRCASE GENERATOR CIRCUIT

Staircase Generator

Figure 10 shows a staircase generator circuit utilizing three

CMOS operational amplifiers. Two CA3130s are used; one

as a multivibrator, the other as a hysteresis switch. The third

amplifier, a CA3160, is used as a linear staircase generator.

Picoammeter Circuit

Figure 11 is a current-to-voltage converter configuration

utilizing a CA3160 and CA3140 to provide a picoampere

meter for 13pA full scale meter deflection. By placing

Terminals 2 and 4 of the CA3160 at ground potential, the

CA3160 input is operated in the “guarded mode”. Under this

operating condition, even slight leakage resistance present

between Terminals 3 and 2 or between Terminals 3 and 4

would result in zero voltage across this leakage resistance,

thus substantially reducing the leakage current.

If the CA3160 is operated with the same voltage on input

Terminals 3 and 2 as on Terminal 4, a further reduction in the

12

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