Negative conductance voltage gain enhancement techniques which substantially increases the dc gain of an operational amplifier without degrading speed are discussed. Three fully differential CMOS op amps using the negative conductance gain enhancement technique are presented. Simulations show that for a 0.35um CMOS technology with a power supply of 3V, a dc gain of more than 94dB is achievable ...

A fully integrated GMSK modulator in DRRS band is presented. All components of the transmitter except the power amplifier, including the loop filter and the oscillator are on-chip. Transistor and system level simulations demonstrate that the modulator meets the performance requirements of the DRRS standard. The circuit power consumption of the modulator at 1.4GHz is 37mW with a single 3V power ...

In this paper we further discuss the embedding problem for nearly Kirkman triple systems and get the result that: (1) For u ≡ v ≡ 0 (mod 6), v¿ 78, and u¿ 3:5v, there exists an NKTS(u) containing a sub-NKTS(v). (2) For v = 18; 24; 30; 36; 42; 48; 54; 60; 66 or 72, there exists an NKTS(u) containing a sub-NKTS(v) if and only if u ≡ 0 (mod 6) and u¿ 3v. c © 2002 Elsevier B.V. All rights reserved.

We consider the relation between SYK-like models and vector models by studying a toy model where a tensor field is coupled with a vector field. By integrating out the tensor field, the toy model reduces to the Gross-Neveu model in 1 dimension. On the other hand, a certain perturbation can be turned on and the toy model flows to an SYK-like model at low energy. A chaotic-nonchaotic phase transit...

Numerical 1D-3V solutions of the Wong-Yang-Mills equations with anisotropic particle momentum distributions are presented. They confirm the existence of plasma instabilities for weak initial fields and of their saturation at a level where the particle motion is affected, similar to Abelian plasmas. The isotropization of the particle momenta by strong random fields is shown explicitly, as well a...

A simple and rapid reverse-phase high-performance liquid chromatographic (HPLC) method for the simultaneous separation and determination of erlotinib and its process-related impurities in bulk drugs has been developed. Five process-related impurities of erlotinib have been separated on an Inerstsil ODS-3V (C18) column and detected at 254 nm using a photo diode array (PDA). This HPLC method was ...

Neuromedin B (NB) is a recently discovered neuropeptide related to bombesin. It is localized to thyrotropes and we have previously shown that it directly inhibits thyrotropin (TSH) release from the anterior pituitary gland of euthyroid rats. In the current studies, we further evaluated the action of NB and antiserum directed against it in euthyroid rats and compared the actions with those in hy...

Ohmic regrowth by molecular beam epitaxy (MBE) has been investigated for metal-face InAlN/AlN/GaN high electron mobility transistors (HEMTs) for the first time. Using SiO2 mask nþ-GaN was regrown in the source/drain region while deposition on the mask was lifted off in buffered HF after regrowth. The lowest contact resistance measured was 0.40 0.23Vmm by the transmission line method (TLM) in th...

In this paper, we propose a level shifter circuit capable of handling a wide input voltage range. The circuit is based on a conventional two-stage comparator, and has a distinctive feature in that it operates a current amplification scheme for ultra low-power operation. The proposed circuit can convert low-voltage input digital signals into high-voltage output digital signals. The circuit achie...