P rogrammable Floating Gate Transistor Operating as a Resistor for Analog Applications

Th is paper presents a programmable resistor using two-input floating gate MOS transistor (FGMOST). One of the two-input gates is connected to the drain and the other is connected to a tuned voltage to control the floatin g gate transistor resistance. A wide range of the programmable resistance is achieved by controlling the tuned voltage. The resistance is changed by 33% by varying the tuned voltage by 0.4 V. Three applicat ions based on FGMOST operated as a resistor are proposed. These are tunable filter, tunable triangular oscillator and tunable amp lifier. The cut-off frequency of the low-pass filter is tuned fro m 21.4 kHz to 32.1 kHz by controlling the tuned voltage by 0.4 V. The oscillation frequency of the triangular oscillator is varied fro m 336.18 kHz to 540.2 kHz by varying the tuned voltage by 0.4. A lso, the gain of the amplifier is changed by 50% by changing the tuned voltage by 0.4 V.

[1]  M. Ortmanns,et al.  A Field-Programmable Analog Array of 55 Digitally Tunable OTAs in a Hexagonal Lattice , 2008, IEEE Journal of Solid-State Circuits.

[2]  Stilianos Siskos,et al.  Design of voltage-mode and current-mode computational circuits using floating-gate MOS transistors , 2004, IEEE Transactions on Circuits and Systems I: Regular Papers.

[3]  Edgar Sanchez-Sinencio,et al.  CMOS transconductance amplifiers, architectures and active filters: a tutorial , 2000 .

[4]  Aimad El Mourabit,et al.  Wide-linear-range subthreshold OTA for low-power, low-Voltage, and low-frequency applications , 2005, IEEE Transactions on Circuits and Systems I: Regular Papers.

[5]  Shantanu Chakrabartty,et al.  An Asynchronous Analog Self-Powered CMOS Sensor-Data-Logger With a 13.56 MHz RF Programming Interface , 2012, IEEE Journal of Solid-State Circuits.

[6]  Jaime Ramirez-Angulo,et al.  MITE circuits: the continuous-time counterpart to switched-capacitor circuits , 2001 .

[7]  D.V. Anderson,et al.  Analog floating-gate, on-chip auditory sensing system interfaces , 2005, IEEE Sensors Journal.

[8]  Maneesha Gupta,et al.  Low Voltage Squarer Using Floating Gate MOSFETs , 2009 .

[9]  R. Bouchakour,et al.  A novel Dual-Control-Gate Floating Gate Transistor used in VCO application , 2011, 2011 International Semiconductor Device Research Symposium (ISDRS).

[10]  E. Rodriguez-Villegas,et al.  A 1-V micropower log-domain integrator based on FGMOS transistors operating in weak inversion , 2004, IEEE Journal of Solid-State Circuits.

[11]  Yngvar Berg.  Ultra low-voltage bidirectional current mirror using clocked semi-floating-gate transistors , 2010, 13th IEEE Symposium on Design and Diagnostics of Electronic Circuits and Systems.

[12]  Antonio J. López-Martín,et al.  A Compact Four-Quadrant Floating-Gate MOS Multiplier , 2004 .