کنفرانس بین المللی میکروالکترونیک ایران

صفحه اصلی / هفتمین کنفرانس بین المللی میکروالکترونیک ایران

A Linear Transconductor for Gm-C Filter Applied in a Switch-Mode Power Supply for IoT Applications

نویسندگان :

Sanaz Gerami¹ Abolfazl Rajaiyan² Yas Hosseini Tehrani³ Seyed Mojtaba Atarodi⁴

1- دانشگاه صنعتی شریف 2- دانشگاه صنعتی شریف 3- دانشگاه صنعتی شریف 4- دانشگاه صنعتی شریف

کلمات کلیدی :

Switch-Mode Power Supply،band-reject filter،linear transconductor،tunable

چکیده :

Designing a band-reject filter for Switch-Mode Power Supply (SMPS) systems is a crucial challenge in power electronics. SMPS circuits need to handle sudden fluctuations like spikes and noise at their output node. To address these issues, a band-reject filter with an adjustable notch frequency is needed. In this paper, a tunable band-reject Gm-C filter with a novel linear transconductor is proposed. The linearization method relies on using three input transconductors that operate in saturation, triode, and subthreshold regions. These work in parallel with an output transconductor in the saturation region to improve linearity. The filter’s notch frequency can be tuned in a range of 50 kHz to 3 MHz. Standard 65-nm CMOS technology has been used for simulating the proposed design. Post-layout simulation results demonstrate that the transconductor maintains linear behavior over a 1 V input range. Additionally, the filter achieves a maximum in-band input-referred third-order intercept point (IIP3) of 16.12 dBm while consuming an average power of 5.372 mW with a 1.2 V supply voltage.