Donhee Ham Research Group
Research Laboratory of Electronics &  Integrated Circuits at Harvard University

Principal Investigator - Donhee Ham
Associate Professor, EE & Applied Physics
School of Eng & Applied Sciences, Harvard U
Wave adaptive resonator tapering
Home      RESEARCH      People      Publications      Sponsors      Teaching      News      Links

RF/Microwave/Analog & Mixed-Signal ICs: Using silicon CMOS technology, we create ICs for communication, computation, and biotechnologies. Current projects include wave-adaptive passives, fastlock hybrid PLL freq synthesizers, PLLs for multidomain synchronous clocking, PLL-based smart temperature sensors, Dicke receivers, digital background calibration of ADCs, and nuclear magnetic resonance RF transceivers for biomolecular sensing.
 Kyoungho Woo's Chip
line
nano
Ultrafast 1D Electron Transport: We study quantum effects, coupling with electromagnetic fields, and collective behaviors in ultrafast electron transport in 1D conductors (carbon nanotubes and other forms of quantum wires) at both room & low temperatures. Final goals are to develop a new type of electronic devices and to investigate the fundamental nature of 1D electron gas.
line
Soliton Electronics: Solitons are pulse-shape nonlinear waves that travel maintaining spatial localizations of energy in the pulse shape. We  recently demonstrated the first electrical circuit that robustly self-generates a stable, periodic train of electrical solitons (e-solitons), which we call e-soliton oscillator, or e-soliton modelocked circuit. We are developing its higher frequency version for ultrafast time-domain metrology applications.

CMOS electrical soliton oscillator
line
Microcoil array
 CMOS/Microfluidic hybrid system
Applications of CMOS ICs in Biotechnology: The speed, complexity, and programmability of CMOS ICs offer new opportunities in biotechnology. We are developing CMOS ICs, often in conjunction with microfluidic systems, to manipulate, sense, and analyze cells and biomolecules such as DNA and proteins.
line
Fundmanetal Theories: We apply non-equilibrium statistical physics to active electrical circuits to attain understanding of noise processes and fundamental limits. This study also examines noise-enhanced phenomena such as Brownian motors & stochastic resonance. We are also interested in chaotic communications.
chaos
line
Maxwell-Dworkin Laboratory, Harvard U, 33 Oxford Street, Cambridge, MA 02138
PI Ph: (617) 496-9451, Fax: (617) 495-2489, donhee@deas.harvard.edu
Lab1: (617) 496-0142, Lab2: (617) 496-0318, Lab3: (617) 495-1052