TEMPERATURE COMPENSATOR, TEMPERATURE COMPENSATION TYPE OSCILLATOR, AND TEMPERATURE COMPENSATION METHOD

• Main Authors: UCHINAMI KATSUHIKO, HIROSE HIDEAKI, MARU HARUHIKO
• Format: Patent
• Language: English; Japanese
• Published: 18.10.2018
• 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

PROBLEM TO BE SOLVED: To solve the following problem: It is difficult to compensate for a temperature characteristic with high precision because an oscillator has a component of a high-order frequency temperature characteristic and the component scatters uniquely to a device.SOLUTION: The temperature compensator, executing temperature compensation of an oscillator oscillating at a frequency corresponding to a control voltage, includes: a first temperature compensation circuit for generating a first compensation voltage corresponding to a temperature; a second temperature compensation circuit for generating a second compensation voltage which becomes maximum or minimum at a predetermined set temperature and a voltage fluctuation at a temperature out of a temperature range including the set temperature is within an error range; and a control voltage supply circuit for supplying a control voltage based on the first compensation voltage and the second compensation voltage to the oscillator.SELECTED DRAWING: Figure 1 【課題】発振器は高次の周波数温度特性の成分をもち、その成分は素子固有にばらつくので、高精度に温度特性を補償することは困難であった。【解決手段】制御電圧に応じた周波数で発振する発振器の温度補償を行う温度補償装置であって、温度に応じた第１補償電圧を発生するための第１温度補償回路と、予め設定された設定温度において最大または最小となり、設定温度を含む温度範囲より外の温度での電圧変動が誤差範囲内となる第２補償電圧を発生するための第２温度補償回路と、第１補償電圧および第２補償電圧に基づく制御電圧を発振器に供給する制御電圧供給回路とを備える温度補償装置。【選択図】図１