Two-level-multiplexer


Posted on Aug 1, 2012

When a large number of channels are multiplexed, the outputs of two or more multiplexers can be connected together and each multiplexer sequentially enabled. In the inhibit mode. the multiplexer draws less power and its output and inputs act as open circuits. Theoretically, an infinite number of channels can be accommodated in this way; in practice, the accumulated output capacitance and leakage of many paralleled multiplexers limits the speed and accuracy of the system. A much better method is the two-level multiplex system.


Two-level-multiplexer
Click here to download the full size of the above Circuit.

The two-level system has a bank of high-speed switches at the output which sequentially switch between the four DG406s. Each DG406 is able to switch during the time the other three are being interrogated. The DG406s contribute leakage and capacitance at the output only, when they are switched on by the DG411-1/4 of the time. The two-level multiplex system is very useful in communications links, high-speed interfacing with comparators, or wherever a large number of channels must be multiplexed at high speeds.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

80x32 LED matrix display
PC mains switch
Arduino Power
450W Power Factor Controller with Universal Input Voltage Range
avr Piezoelectric Sensor and the ADC
arduino on breadboard
gps altimeter
Experimental Pendulum Clock
Open Decoder Schematics
Automatically Repeating Interval-Timer Circuit
Infrared Wireless Headphones circuit
BTL amplifier circuit composed by M51516L IC



Top