CAJ | 학술논문

设计了一种广泛应用于开关电源的可修调高稳定性单边锯齿波RC振荡器。采用芯片内部5 V线性稳压电源供电,用外部电阻电容确定振荡频率,加入电阻修条技术以调整由于工艺容差引起的振荡电路放电时间的变化。在输入电压为4.9～5.1 V,温度范围为-55℃～125℃,以及三个电阻工艺容差的情况下,进行了HSpice仿真,结果表明,同一工艺条件下振荡器周期的最大偏差为2.8。使用1μm双极工艺流片,振荡电路测试结果表明,频率偏差仅为1.8。
설계료일충엄범응용우개관전원적가수조고은정성단변거치파RC진탕기。채용심편내부5 V선성은압전원공전,용외부전조전용학정진탕빈솔,가입전조수조기술이조정유우공예용차인기적진탕전로방전시간적변화。재수입전압위4.9～5.1 V,온도범위위-55℃～125℃,이급삼개전조공예용차적정황하,진행료HSpice방진,결과표명,동일공예조건하진탕기주기적최대편차위2.8。사용1μm쌍겁공예류편,진탕전로측시결과표명,빈솔편차부위1.8。
A unilateral sawtooth RC oscillator with trimmable technology which was widely used in switching mode power supply was proposed.Using the internal 5V low dropout regulator power supply,trimming resistor technology and with external resistor and capacitor determine the oscillator frequency,which significantly stabilize the discharging time of the circuit induced by process variation.The circuit was simulated with HSpice under all resistor corners within the voltage and temperature range from 4.9V to 5.1V and-55 oC to 125 oC,respectively.Results indicated that the maximum oscillator frequency variation was 2.8% under the worst case.Based on 1μm bipolar process,the oscillator was taped out and the test result indicate that the frequency deviation was only 1.8%