Arithmatic Logic Unit

Posted on Feb 6, 2014

Creating a 2-bit alu. It has 8 defined functions (the functions are defined by a 3bit code), AND XOR etc, and these functions act on two, 2-bit binary numbers and produce a 2-bit answer. From what I have done so far, I have a decoder that decodes what the function is, and the output of that powers/activates the corresponding purpose of that function. The problem I`m having is, the outputs of the two functions XOR and AND have to

Arithmatic Logic Unit
Click here to download the full size of the above Circuit.

go into LSB, MSB and carryOut to indicate the answer, however since the outputs are tied together it causes an error. And I can`t have 3 separate LED`s defined for each function. I must only use that 3 (LSB, MSB and carryOut). *note on the image* a - LSB of binary number 1 {these are controlled by switches} b - MSB of binary number 1 c - LSB of binary number 2 d - MSB of binary number 2 cin - carry in.

Leave Comment

characters left:

New Circuits



Popular Circuits

Automatic Gain Control ( AGC )
Powerful LED Flashlight circuit
Sequential timer
Automatic Emergency Lighting Unit
modified battery charger circuit
Amp Circlotron
fm wireless microphone circuit
Commodore 64 Cassette Interface
555 1 Hz pulse generator
ICL3232 250kbps RS-232 Transmitters/Receivers
led bicycle lights
Ridiculously Simple AVR AM Radio Transmitter
Pressure Transmitter Data Acquisition System circuit 1B31,18 bit A / D converter AD1170 and MCS-51 microcontroller
Comparison of various circuit diagram VI conversion and a constant current source