DTL-TTL controlled buffered analog switch

This analog switch utilizes the 2N4860 JFET, which features a low on-resistance of 25 ohms and minimal leakage current. The LM102 is employed as a voltage buffer in the circuit. Additionally, this configuration can be modified for use in a dual trace oscilloscope chopper. The DS7800 monolithic integrated circuit (IC) supplies sufficient switch drive, which is controlled by DTL/TTL logic levels.

The analog switch circuit described incorporates the 2N4860 JFET, known for its excellent performance in low-resistance applications. The JFET's on-resistance (ron) of 25 ohms ensures minimal signal loss when the switch is in the closed position, making it suitable for precision signal routing in various electronic applications. The low leakage current characteristic of the 2N4860 further enhances the circuit's reliability, particularly in applications where signal integrity is paramount.

The use of the LM102 as a voltage buffer is crucial for isolating the input signal from the output, thereby preventing loading effects that could distort the signal. This buffer allows for a stable voltage level to be maintained across the switch, ensuring that the output accurately reflects the input without degradation.

The versatility of the circuit is highlighted by its adaptability for use in a dual trace oscilloscope chopper. In this application, the analog switch can be employed to alternate between two input signals, allowing for simultaneous observation of both signals on a single display. This capability is especially useful in troubleshooting and analyzing complex waveforms in electronic circuits.

The DS7800 monolithic IC plays a key role in driving the analog switch. It is designed to interface seamlessly with DTL (Diode-Transistor Logic) and TTL (Transistor-Transistor Logic) logic levels, making it compatible with a wide range of digital circuits. The DS7800 provides the necessary control signals to activate the 2N4860 JFET, ensuring that the switch operates reliably within the specified logic levels.

Overall, this analog switch circuit is characterized by its low on-resistance, minimal leakage, and adaptability for various applications, including dual trace oscilloscopes. The combination of the 2N4860 JFET, LM102 voltage buffer, and DS7800 IC creates a robust solution for precise signal management in electronic systems.This analog switch uses the 2N4860 JFET for its 25 ohm ron and low leakage. The LM102 serves as a voltage buffer. This circuit can be adapted to a dual trace oscilloscope chopper The DS7800 monolithic IC provides adequate switch drive controlled by DTL/TTL logic levels. 🔗 External reference