ข้อมูลนักวิจัย : ไชยยันต์ ชนะพรมมา
รายละเอียดงานวิจัย
ชื่องานวิจัย : New method to design feedback amplifier employing two-stage CMOS op amp
ปีที่จัดทำ : 2564
ผู้จัดทำ : ไชยยันต์ ชนะพรมมา (
เจ้าของงานวิจัย
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ประเภทงานวิจัย :
บทความวิจัยระดับนานาชาติ
สถานะ :
งานวิจัยได้รับการตีพิมพ์
แหล่งทุน :
แหล่งตีพิมพ์เผยแพร่ : International Journal of Electronics and Communications (AEUE), 132 (2021) 153616 ปี (2021)
วันที่ตีพิมพ์ : April 2021
หน้าที่ : 1-7
ค่าถ่วงน้ำหนัก : 1.00
งบประมาณ : 0.00
บทคัดย่อ :
A new method to design feedback amplifier employing two-stage CMOS op amp is proposed. It is shown that although the open-loop phase margin of around 65 degrees is suitable for op amp connected as unity-gain amplifier (100% feedback), such is not the case when amplifier’s feedback factor of is less than 100%. In the proposed design method, the open-loop phase margin requirement is replaced by closed-loop bandwidth and quality factor of feedback amplifier such that a better control of the responses of the amplifier is achieved. Comparison of simulation results of feedback amplifiers obtained from the traditional method and the proposed method is given. It is demonstrated that the inverting amplifier obtained from the proposed method consumes somewhat less power than the one obtained from the traditional design, which employs the op amp with 65 degrees phase margin, while having comparable gain, bandwidth, transient and noise performances.
A new method to design feedback amplifier employing two-stage CMOS op amp is proposed. It is shown that although the open-loop phase margin of around 65 degrees is suitable for op amp connected as unity-gain amplifier (100% feedback), such is not the case when amplifier’s feedback factor of is less than 100%. In the proposed design method, the open-loop phase margin requirement is replaced by closed-loop bandwidth and quality factor of feedback amplifier such that a better control of the responses of the amplifier is achieved. Comparison of simulation results of feedback amplifiers obtained from the traditional method and the proposed method is given. It is demonstrated that the inverting amplifier obtained from the proposed method consumes somewhat less power than the one obtained from the traditional design, which employs the op amp with 65 degrees phase margin, while having comparable gain, bandwidth, transient and noise performances.
หมายเหตุ :
Chaiyan Chanapromma, and Jirayuth Mahattanakul. (2021). New method to design feedback amplifier employing two-stage CMOS op amp. International Journal of Electronics and Communications (AEUE), 132 (2021), 153616. doi:10.1016/j.aeue.2021.153616
Chaiyan Chanapromma, and Jirayuth Mahattanakul. (2021). New method to design feedback amplifier employing two-stage CMOS op amp. International Journal of Electronics and Communications (AEUE), 132 (2021), 153616. doi:10.1016/j.aeue.2021.153616