| 摘要 |
PURPOSE:To miniaturize a signal processing circuit and to attain rapid processing by allowing a digital circuit to simulate I/O operation executed at the time of feeding back an inverted input terminal by an analog operational amplifier to obtain a digital signal processing type operational amplifier. CONSTITUTION:The amplifier device is provided with two subtractors 2, 3, an adder 4, a delay 5, and a function computing element 6. Thereby, the output of a 1st subtractor 2 and the input value of a 2nd subtarctor 3 are respectively applied as an inverted input and a non-inverted input at the time of feeding back the inverted input terminal by a virtual analog operational amplifier and these inputs are driven so as to coincide with each other like the analog operational amplifier. Consequently, the operation of the analog operational amplifier can simulated by the digital signal processing circuit, the signal processing circuit can be miniaturized and rapid processing can be attained. |
