PURPOSE: To relieve the increase in the circuit scale in the case of digital processing by employing a barrel shifter, an adder and an accumulator used repetitively with respect to a latched output of three input registers for a digital arithmetic circuit being a component of an amplifier.
CONSTITUTION: A digital arithmetic circuit 70 consists of a TA register 16 being a 1st temporary latch register, a TC register 17 being a 2nd temporary latch register, and a TB register 18 being a 3rd temporary latch register and has amplifier functions 21-26 and an addition function 27. Thus, after latch outputs of the three input registers are amplified, they are all added to output a 1st output signal, and latch outputs of the 1st input register 16 and the 2nd input register 17 are amplified and any signal is outputted as a 2nd output signal.
SAKIYAMA SHIRO
MICHIMASA SHIRO
NAKAHIRA HIROYUKI
