Kikusui Electronics Corporation

Yuji Fujita

Takeshi Ito

Masao Izawa

A data display apparatus with a function for correcting the effect of external magnetic field including a display, a driving circuit for driving the display, an adjuster for adjusting a display position of input signal, a detector for detecting an output voltage of the driving circuit, and a difference detection circuit. The difference detection circuit detects a difference between an output of the detector when a predetermined reference signal is inputted as the input signal and an output of the detector when a display position of the predetermined reference signal is adjusted to a reference position on the screen of the display by the adjuster. The difference is stored in a memory as calibration data for correcting the effect of external magnetic field or the like.

Data display apparatus with function for correcting effect of external

A linear interpolator comprising an amplifier, an integrator for integrating an output of the amplifier, a feedback circuit connected between the amplifier and the integrator for bootstrapping an input voltage of the amplifier by an output voltage from the integrator, and a switch for periodically supplying a staircase input signal to the amplifier. A linearly interpolated output is derived from the integrator. The discrete input signal changing stepwise can be linearly interpolated with high accuracy.

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Kawasaki, Japan

Yuji Fujita