Low-noise, low-distortion Gilbert current gain-cell and Gilbert cell transconductor. - Phanumas Khumsat; Alison J. Payne (ISCAS (2), 1999)

On the feasibility of fT-integration employing reverse-active vertical npn's. - Phanumas Khumsat; Apisak Worapishet; Alison J. Payne (ICECS, 2001)

fT-integration based continuous-time filters for very high frequencies. - Phanumas Khumsat; Apisak Worapishet (ISCAS (1), 2001)

FT-integrator in digital CMOS process for continuous-time ΣΔ modulator. - Phanumas Khumsat; Apisak Worapishet; Alison J. Burdett (ICECS, 2002)

Class-AB fT-integrator for low-distortion, high-frequency continuous-time filters. - Phanumas Khumsat; Apisak Worapishet (ICECS, 2003)

Highly-linear, current-feedback resistive source-degenerated MOS transconductor. - Phanumas Khumsat; Apisak Worapishet (ISCAS (1), 2004)

Application of reverse-active npns for compact, wide-tuning fT-integration-based filters in SiGe HBT BiCMOS technology. - Phanumas Khumsat; Apisak Worapishet (ISCAS (6), 2005)

Optical Front-Ends for Low-Cost Laser-Based 10-Mbps Free-Space Optical Transceiver. - Phanumas Khumsat; Noppadol Wattanapisit; Karel Kulhavey (APCCAS, 2006)

Differential-Mode/Common-Mode Feedforward Transconductor for Low-Voltage Gm-C filters. - Phanumas Khumsat; Apisak Worapishet; Klanarong Noulkaew; Theerachet Soorapanth (ICECS, 2006)

High-gain current amplifiers for low-power MOSFET-C filters. - Phanumas Khumsat; Apisak Worapishet (ISCAS, 2006)

Single-stage CMOS OTA for active-RC filter design. - Phanumas Khumsat; Apisak Worapishet (ECCTD, 2007)

Compact Two-Stage Class-AB CMOS OTA for Low-Voltage Filtering Applications. - Phanumas Khumsat; Apisak Worapishet (IEICE Trans. Electron., 2007)

Two-Stage Feedforward Class-AB CMOS OTA for Low-Voltage Filtering Applications. - Phanumas Khumsat; Apisak Worapishet (IEICE Trans. Electron., 2007)

Structure of complex elliptic Gm-C filters suitable for fully differential implementation. - Jirayuth Mahattanakul; Phanumas Khumsat (IET Circuits Devices Syst., 2007)

Double-Capacitor Technique for Wide Frequency Range Phase Compensation in Gm-C and MOSFET-C Filters. - Phanumas Khumsat; Apisak Worapishet; Wanlop Surakampontorn (IEICE Trans. Electron., 2009)

Analysis and Design of Sub-Threshold R-MOSFET Tunable Resistor. - Apisak Worapishet; Phanumas Khumsat (IEICE Trans. Electron., 2009)

Selection of the common-mode feedback network connection of fully differential Gm-C filters. - Jirayuth Mahattanakul; Phanumas Khumsat; Wanlop Surakampontorn (IET Circuits Devices Syst., 2009)

Ladder-simulation elliptic bandpass active-RC filter structure employing identical resistors. - Jirayuth Mahattanakul; Phanumas Khumsat; Wanlop Surakampontorn (IET Circuits Devices Syst., 2009)

A 0.5-V R-MOSFET-C Filter Design Using Subthreshold R-MOSFET Resistors and OTAs With Cross-Forward Common-Mode Cancellation Technique. - Phanumas Khumsat; Apisak Worapishet (IEEE J. Solid State Circuits, 2012)

Multi-Band Low-IF Receiver Utilizing Complex Filter I/Q Switching Technique. - Phanumas Khumsat; Chutpipat Chaichomnan (TENCON, 2018)

Linearisation technique for low-voltage tuneable Nauta's transconductor in Gm - C filter design. - Phanumas Khumsat (IET Circuits Devices Syst., 2018)

Time-Domain ADPLL BPSK, QPSK, and 8PSK Demodulators. - Phanumas Khumsat; Thanabodee Koyphol; Tan Thongruk; Tidarat Inyod (J. Electr. Comput. Eng., 2025)