CIRCUIT ARRANGEMENT AND OSCILLATOR

• Main Authors: CHOKAI YUICHI, HIGUCHI TEPPEI, HANEDA HIDEO
• Format: Patent
• Language: English; Japanese
• Published: 11.04.2022
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; GENERATION OF NOISE BY SUCH CIRCUITS; GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER

To provide a circuit arrangement that can achieve highly accurate temperature compensation while efficiently using a memory.SOLUTION: A circuit arrangement 100 includes: an oscillation circuit 160 that generates an oscillation signal by using an oscillator 10; a frequency adjustment circuit 150 that adjusts the oscillatory frequency of the oscillation circuit 160 based on frequency adjustment data CLa, CLb; a temperature sensor circuit 110 that outputs temperature data TD; an arithmetic circuit 120; and a storage circuit 130. The arithmetic circuit 120 performs, on the temperature data TD, conversion processing in which the inclination of conversion temperature data ETD with respect to the temperature data TD within a first temperature range and the inclination of conversion temperature data ETD with respect to the temperature data TD within a second temperature range are different from each other, and thereby outputs the conversion temperature data ETD. The storage unit 130 stores a look-up table 131 representing the correspondence between the conversion temperature data ETD and the frequency adjustment data CLa, CLb.SELECTED DRAWING: Figure 2 【課題】メモリーを効率的に利用しつつ高精度な温度補償を実現できる回路装置等を提供すること。【解決手段】回路装置１００は、振動子１０を用いて発振信号を生成する発振回路１６０と、周波数調整データＣＬａ、ＣＬｂに基づいて発振回路１６０の発振周波数を調整する周波数調整回路１５０と、温度データＴＤを出力する温度センサー回路１１０と、演算回路１２０と、記憶回路１３０とを含む。演算回路１２０は、第１温度範囲における温度データＴＤに対する変換温度データＥＴＤの傾きと、第２温度範囲における温度データＴＤに対する変換温度データＥＴＤの傾きとが異なる変換処理を温度データＴＤに行うことで、変換温度データＥＴＤを出力する。記憶回路１３０は、変換温度データＥＴＤと周波数調整データＣＬａ、ＣＬｂの対応を表すルックアップテーブル１３１を記憶する。【選択図】 図２