Digital electronic circuit for addition, subtraction, division and multiplication - has four bit numbers fed to switchable binary adder and subtractor operating with shift registers and control pulse generator, with main circuit formed so that conductor path is clearly recognisable

摘要

The digital electronic circuit for processing of coded numbers has a main circuit (10) formed by three coupled stages (10a, 10b, 10c). One of stages (10b) contains a four-bit arithmetic stage that can be switched between addition and subtraction functions. Number transfers are directed by a gating circuit together with a memory array. Values are stored in shift registers and the system is controlled by pulses generated by a separate circuit. The decimal point is moved with in the shift registers. ADVANTAGE - Improved arithmetic processing.