Low-frequency-multivibrator

Description: This circuit utilizes one half of the CA3290 BiMOS dual voltage comparator as a conventional multivibrator. The second half ensures frequency stability against the effects of output loading. Large values of the timing resistor, Rl, guarantee long time delays when used with low-leakage capacitors.

The described circuit employs the CA3290 BiMOS dual voltage comparator, which is known for its high input impedance and low power consumption. In this application, one half of the comparator functions as a multivibrator, generating a square wave output. The second half of the comparator is utilized to maintain the frequency stability of the multivibrator output, compensating for any variations caused by loading effects on the output.

Timing in this circuit is primarily determined by the resistor Rl and the associated timing capacitor. By selecting large values for Rl, the circuit can achieve extended time delays, which is particularly useful in applications requiring long pulse widths or delays. The use of low-leakage capacitors in conjunction with the large timing resistor further enhances the performance by minimizing charge leakage, thereby maintaining the integrity of the timing intervals.

The configuration of the circuit allows for flexibility in adjusting the frequency and duty cycle by varying the values of Rl and the timing capacitor. This makes it suitable for a variety of applications, including timer circuits, pulse generators, and other timing-related functions in electronic systems.

Overall, the use of the CA3290 BiMOS dual voltage comparator in this manner provides a robust solution for generating stable timing signals while accommodating the effects of output loading and ensuring long-duration timing capabilities.This circuit uses half the CA3290 BiMOS dual voltage comparator as conventional multivibrator. The second half maintains frequency against effects of output loading. Large values of timing resistor, Rl, .assure long time delays with low-leakage capacitors.