Kasemsuwan, Varakorn
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Preferred name
Kasemsuwan, Varakorn
Alternative Name
Kasemsuwan, V.
Kasemsuwan, Varakom
Main Affiliation
Email
varakorn.ka@kmitl.ac.th
12 results
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Item type:Publication, A robust high-speed low input impedance CMOS current comparator(2008-12-01); Khucharoensin, SurachetIn this paper, a robust high-speed low input impedance CMOS current comparator is proposed. The front end of the comparator uses the modified Wilson current-mirror and diode-connected transistors to perform a current subtraction and current to voltage conversion simultaneously. The circuit is immune to the process variation and has low input impedances. HSPICE is used to verify the circuit performance with a 0.5 μm CMOS technology. The simulation results show the propagation delay of 1.67 ns, input impedances of 123 Ω, and 126 Ω, and average power dissipation of 0.63 mW for ± 0.1 μA input current under the supply voltage of 3 V. © 2008 World Scientific Publishing Company. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A current-mode common-mode feedback circuit (CMFB) with rail-to-rail operation(2011-06-13) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Current-mode pseudo-exponential-control variable-gain amplifier using fourth-order Taylor's series approximation(2006-03-30) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Simple ± 0.75 volt rail-to-rail current feedback operational amplifier and its application for oscillator(2007-01-01); Nakhlo, WeerachaiA simple rail-to-rail CMOS current feedback operational amplifier (CFOA) is presented. The circuit is developed based on a simple complementary source follower with a common-source output stage. The circuit is designed using a 0.13 μm CMOS technology and HSPICE is used to verify the circuit performance. The circuit operates under the supply of ± 0.75 Volt and can drive sinusoidal input of ± 0.5 Volt to a 300 Ω with the total harmonic distortion of less than 0.8% at 1 MHz. The amplifier, configured for non-inverting gain of two and a 300 Ω load provides 3-dB bandwidth of 40 MHz. The rising slew rate (SR+) and falling slew rate (SR-), for a 300 Ω // 5 pF load are 257 V/μS and 464 V/μS, respectively. The power dissipation is 2.6 mW. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Microcorona Discharge-Mediated Nonthermal Atmospheric Plasma for Seed Surface Modification(2018-07-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Current mode automatic gain control(2008-01-01); Arthansiri, TeerawatThis paper presents a current mode automatic gain control (AGC) using a new current mode pseudo exponential-control variable gain amplifier (VGA). The VGA is based on the 4<sup>th</sup> order Taylor's series approximation to obtain a large control range. The circuit Is designed using CMOS technology and can operate with ± 1 V supply voltages. The control range is 25 dB with the maximum error less than 0.5 dB. The power dissipation is 3 mW. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A fully differential CMOS transimpedance amplifier for optical receiver(2007-01-01); Pongpalit, WacharapolIn this paper, a CMOS differential transimpedance amplifier is presented. The basic amplifier employs f<inf>T</inf> doubler and compensation capacitor techniques to enhance the bandwidth. The shunt-shunt feedback configuration is used to compromise between the wide bandwidth of the low impedance design and the low noise performance of the high impedance design. The phantom zero introduced by the feedback network is used to position the pole of the closed-loop system. HSPICE is used to verify the circuit performance with a 0.5 μm CMOS technology and a supply voltage of 2.5 V. Simulation results show the gain and -3 dB bandwidth of 80 dB and 2.4 GHz respectively. The equivalent input noise current is less than 18.4 pA/√Hz within the amplifier frequency band and the total power dissipation is 23 mW. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A CMOS inverter-based class-AB pseudo-differential amplifier with current-mode common-mode feedback (CMFB)(2013-02-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Simple DC model for dual channel high electron mobility transistors(1998-12-01)In this paper, the dc model for dual channel high electron mobility transistor(DC-HEMT) is presented. The model is developed based on a single charge expression that describes four different charge components: two dimensional electron gas on the top and bottom channels, free electrons and the neutralized donors in AlGaAs layer. This expression not only shows the smoothness of the charges over a wide range of applied gate voltages but also shows a good agreement with the numerical solution of the charges. The current voltage characteristics is derived including the effect of the parasitic source and drain resistances, the mobility degradation and channel length modulation through a quasi two dimensional Poisson equation in the high field region of the channel. Finally, the theoretical predictions of the model are compared with the experimental data and found to be in good agreement. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Field electron emission enhanced streamer cold plasma interaction on seed surface wettability(2021-02-01)