LM13700MX National Semiconductor, LM13700MX Datasheet - Page 17

• Manufacturer Part Number: LM13700MX
• Description: IC,Operational Amplifier,DUAL,BIPOLAR,SOP,16PIN,PLASTIC
• Manufacturer: National Semiconductor

Specifications of LM13700MX

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Voltage Controlled Oscillators
Figure 18 shows how to build a VCO using one amplifier when the other
amplifier is needed for another function.
FIGURE 18. Single Amplifier VCO
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FIGURE 17. Sinusoidal VCO
(Continued)
17
Additional Applications
Figure 19 presents an interesting one-shot which draws no
power supply current until it is triggered. A positive-going
trigger pulse of at least 2V amplitude turns on the amplifier
through R
plifier regenerates and latches its output high until capacitor
C charges to the voltage level on the non-inverting input. The
output then switches low, turning off the amplifier and dis-
charging the capacitor. The capacitor discharge rate is
speeded up by shorting the diode bias pin to the inverting
input so that an additional discharge current flows through D
when the amplifier output switches low. A special feature of
this timer is that the other amplifier, when biased from V
can perform another function and draw zero stand-by power
as well.
B
and pulls the non-inverting input high. The am-
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