Free electronic circuit design and schematic diagram
To reach low channel ON resistance (<30 Ohm) and low OFF current leakage, 4-channel commutator uses the 2N4091. The DM7800 voltage translator is a monolithic device. This device give us +10V to -20V gate drive to the JFETs while at the same time giving DTL-TTL logic compatibility. Here’s the circuit diagram: [Source: National Semiconductor Application Note]
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This is a circuit of differential analog switch. This circuit uses the FM1208 monolithic dual. Here is the circuit: This circuit is ideal choice for an accurate multiplexer because RDS (on) for the monolithic dual tracks at better than ± 1% over wide temperature ranges (-25 to +125°) although it is unusual. [Source: National Semiconductor Application Note]
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