| 摘要 |
PROBLEM TO BE SOLVED: To generate an approximation quadratic term with a simple configuration.SOLUTION: The present invention includes: an AD converter 15 which converts an input signal x which takes a continuous value into a discrete value x; a variable gain amplifier 11 in which, when the input signal x is received, gain is varied according to the discrete value x; and a coefficient amplifier 23 which multiplies an output signal of the variable gain amplifier 11 by a coefficient a. An approximation quadratic term axx is generated as an output of the coefficient amplifier 23. |
