摘要 |
<p>Data such as temperature compensation data for a temperature compensated crystal oscillator is stored in a converted form in a memory section to reduce a required memory capacity. A digital input signal such as a 10 bit digital signal representing an ambient temperature of the crystal oscillator is divided into a first signal section (such as upper 6 bits) and a second signal section (the remaining lower four bits, for example). The first signal section is inputted to the memory section as an address input, and a data item specified by the address input is read out from the memory section. The readout data item and the second signal section are supplied, as decoder input signal, to a decoder for performing a mathematical operation by using these decoder input signals. In the case of the temperature compensated crystal oscillator system, the result of the mathematical operation of the decoder is supplied to a digital-to-analog converter. <IMAGE></p> |
申请人 |
KABUSHIKI KAISHA MEIDENSHA |
发明人 |
WATANABE, TAKAO, C/O K.K. MEIDENSHA;HAYASHI, MUTSUO, C/O K.K. MEIDENSHA;MATSUMOTO, KAZUNARI, C/O K.K. MEIDENSHA;TSUCHIYA, CHIKARA, C/O FUJITSU LIMITED;MATSUI, TAKASHI, C/O FUJITSU LIMITED;MATSUBAYASHI, MASARU, C/O K.K. MEIDENSHA |