IJE TRANSACTIONS A: Basics Vol. 31, No. 10 (October 2018) 1633-1641   

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P. Karuppanan and K. Anuradha
( Received: July 29, 2017 – Accepted in Revised Form: April 26, 2018 )

Abstract    This article proposed a simple self cascode RGC amplifier configuration to increase the gain and bandwidth. The cascode amplifier eliminates the miller capacitance between input and output and facilitates high gain, high input and output impedance with high bandwidth. However, the cascode amplifier requires relatively high supply voltage for proper operation and it decreases the output voltage swing by overdrive voltage. These issues are overcome by self cascode based RGC amplifier; even though it has low bandwidth due to the presence of one of its pole at low frequency. The bandwidth and output impedance of the conventional RGC has increased using a split length compensation technique. To improve the overall performance of the amplifier, introduced a simple self cascode RGC without using additional passive elements. The expression of gain and output impedance for the proposed amplifier is derived using small signal analysis. The calculated value of voltage gain for the projected circuit is 58.37 dB which is more than the self cascode based RGC. The power dissipation of the proposed circuit is 1.07 µWatt and it was compared with CS, cascode, self cascode and SC based cascode, RGC, SC based RGC amplifiers.


Keywords    Self cascode, Regulated cascode, self cascode based regulated cascode, simple self cascode Regulated Cascode



در این مقاله، یک پیکربندی آمپلی‌فایر RGC خودکامپیوتر ساده برای افزایش سود و پهنای باند پیشنهاد شده است. آمپلی‌فایر کاسکوود ظرفیت میلز را بین ورودی و خروجی حذف می‌کند و امپدانس بالا، ورودی بالا و پهنای باند بالا را تسهیل می‌کند. با این حال، تقویت‌کننده کواکدون نیاز به ولتاژ منبع تغذیه نسبتاً بالا برای عملکرد مناسب دارد و نوسان ولتاژ خروجی را با ولتاژ overdrive کاهش می‌دهد. این مسائل با آمپلی‌فایر RGC مبتنی بر خودکامپیوتر غلبه می‌کند؛ حتی اگر پهنای باند کم با توجه به حضور یک قطب آن در فرکانس پایین باشد. پهنای باند و امپدانس خروجی RGC معمولی با استفاده از روش جبران تقسیم طول موج افزایش یافته است. برای بهبود عملکرد کلی تقویت‌کننده، یک RGC خود کاسکت ساده بدون استفاده از عناصر منفعل اضافی معرفی شده است. بیان امپدانس افزایش و امپدانس برای تقویت‌کننده پیشنهادی با استفاده از تحلیل سیگنال کوچک مشتق شده است. مقدار محاسبه شده از ولتاژ برای مدار پیش‌بینی شده dB 37/58 است که بیشتر از RGC مبتنی بر خود کاسکو است. از دست دادن قدرت مدار پیشنهادی 07/1 مگاوات است و با CS، cascode، self cascode و cascode based SC، RGC، SC تقویت‎کننده‎های RGC مقایسه شده است.


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