| 摘要 |
PURPOSE:To simplify the correction of fluctuation in fine tuning analog data, by comparing a tuning signal with a correction tuning signal and outputting a stop signal when the signals are coincident with each other. CONSTITUTION:In correcting the fluctuation in the fine tuning analog data of analog memories AM0-AMn, a coarse analog signal from a D/A converter 4 and a correction signal outputted from a slider of a variable resistor VR2 are summed at an addition section 9. A signal from an addition section 6 where the coarse tuning digital signal and the fine tuning analog signal from an analog output circuit 5 are summed, and an output of the addition section 9 are compared at a comparator 8. When both tuning signals are coincident with each other, a write stop signal is outputted to a mode set circuit from the comparison section, both memories DM0, AM0 are controlled to the readout mode and the correction of fluctuation in the fine tuning analog data of the analog memory AM0 is finished. |
