4-Channel Commutator Circuit

This 4-channel commutator utilizes the 2N4091 to achieve a low channel ON resistance (approximately 30 ohms) and minimal OFF current leakage. The DM7800 voltage translator is a monolithic device that provides gate drive voltages ranging from 10V to 20V to the JFETs while ensuring DTL-TTL logic compatibility. A schematic drawing accompanies this description.

The 4-channel commutator circuit is designed to switch multiple signal paths effectively while maintaining low resistance and high reliability. The key component, the 2N4091 JFET, is chosen for its low ON resistance of approximately 30 ohms, which minimizes power loss and improves signal integrity. The low OFF current leakage characteristic of the 2N4091 ensures that when the channels are not active, they do not draw significant power, enhancing the overall efficiency of the circuit.

The DM7800 voltage translator plays a crucial role in the operation of the commutator by providing the necessary gate drive voltages. With an output voltage range of 10V to 20V, it can adequately drive the JFETs, ensuring that they switch on and off effectively. This capability allows the circuit to interface seamlessly with both DTL (Diode-Transistor Logic) and TTL (Transistor-Transistor Logic) logic families, making it versatile for various applications.

The schematic representation of the circuit typically includes the 2N4091 JFETs arranged in a manner that allows for the selection of different channels. Each channel's gate is connected to the output of the DM7800, which is controlled by the logic inputs from the DTL or TTL devices. The design may also include pull-down resistors to stabilize the gate voltages when the input signals are not active.

In summary, this 4-channel commutator circuit effectively combines the low ON resistance and low OFF leakage characteristics of the 2N4091 with the versatile voltage driving capabilities of the DM7800, resulting in a reliable and efficient solution for switching applications in digital circuits.This 4-channel commutator uses the 2N4091 to achieve low channel ON resistance (k30X) and low OFF current leakage. The DM7800 voltage translator is a monolithic device which provides from a10V to b20V gate drive to the JFETs while at the same time providing DTL-TTL logic compatability.

Here is a schematic drawing: 🔗 External reference