High gain amplifier with feedforward compensation based on quasi-floating gate transistors

作者：Lemus Lopez Javier; Diaz Sanchez Alejandro; Miguel Rocha Perez Jose; Muniz Montero Carlos; Ramirez Angul Jaime

来源：Integration, the VLSI Journal, 2017, 59: 75-80.

DOI：10.1016/j.vlsi.2017.05.007

• Analog circuits
• Frequency compensation
• Feedforward
• Quasi-floating gate transistors
• Two-stage operational amplifiers

In this paper, a two-stage amplifier with feedforward frequency compensation scheme is presented. Because the frequency compensation scheme uses the amplifier's second stage gm to create the feedforward path no additional circuitry is needed. To verify the proposed scheme a prototype was fabricated using 0.5 pm technology. Measurements results demonstrate a high DC gain, 18 MHz of gain-bandwidth product and 86 phase margin are achieved with an output load capacitance of 80 pF.

• 出版日期2017-9