Patent application number | Description | Published |
20100001707 | STEPWISE RAMP VOLTAGE GENERATOR - A stepwise voltage ramp generator includes a tank capacitor, a terminal of which is coupled to a reference potential to be charged with a voltage ramp. A transistor couples the tank capacitor to a supply line. A diode-connected transistor, biased with a bias current is coupled to the transistor to form a current mirror. A by-pass switch is electrically coupled in parallel to the diode-connected transistor, and is controlled by a PWM timing signal, the duty-cycle of which determines a mean slope of the generated voltage ramp. | 01-07-2010 |
20100156335 | METHOD OF DETERMINING THE GAIN OF A BEMF AMPLIFIER AND RELATIVE CONTROL CIRCUIT OF AN INDUCTION ELECTRIC MOTOR - A method for determining gain of a back-electromotive force amplifier may include setting an electric motor into a tri-state function mode and storing a first quasi steady-state value for back-electromotive force from the difference signal, and forcing a reference current through the electric motor and determining a first value of the gain of the amplifier for equaling a difference signal to the first quasi steady-state value. The method may further include setting the electric motor into a tri-state function mode a second time and storing a second quasi steady-state value for back-electromotive force from the difference signal, and increasing the first value of the gain by an amount proportional to a difference between the second quasi steady-state value and the first quasi steady-state value. | 06-24-2010 |
20120112681 | CURRENT LIMITING FOR A MOTOR WINDING - Techniques and apparatus for limiting the current through a motor, such as a motor for rotating a rotatable element of a hard drive. The current can be limited based on a threshold. A first threshold value can be set for a first time period. A second threshold value can be set for a second time period in which the current through the motor rises. The second threshold value is lower than the first threshold value. A spike in the supply current upon accelerating the rotatable element of the motor can thereby be reduced or eliminated. | 05-10-2012 |
Patent application number | Description | Published |
20080300228 | Crystalline Rostafuroxin - New crystalline forms of 17β-(3-Furyl)-5-βandrostane-3β,14β,17α-triol are described together with pharmaceutical composition containing the same and methods for their preparation. In particular new Forms B, C, D, E and H are here described. | 12-04-2008 |
20100249414 | CRYSTALLINE FORM II OF 7-(DIMETHOXY-METHYL) CAMPTOTHECIN, ITS USE AS INTERMEDIATE AND PRODUCTS OBTAINED THEREFROM - This invention relates to a process for preparing a crystalline form of (4S)-11-(dimethoxymethyl)-4-ethyl-4-hydroxy-1H-pyrano[3′,4′:6,7]indolizino[1,2-b]qui-noline-3,14(4H,12H)-dione (also named 7-(dimethoxy-methyl)camptothecin). With the provision of a particular crystallization step, in appropriate way, a new crystalline form of the above compound is obtained. The process for the preparation of the polymorph Form II comprises transforming camptothecin to the corresponding 7-(dimethoxy-methyl)-camptothecin, and crystallizing it from methanol. | 09-30-2010 |
20110053902 | AMINO DERIVATIVES OF ANDROSTANES AND ANDROSTENES AS MEDICAMENTS FOR CARDIOVASCULAR DISORDERS - Compounds of formula (I) wherein: the groups are as defined in the description, are useful for the preparation of medicaments for the treatment of cardiovascular disorders, in particular heart failure and hypertension. The compounds are inhibitors of the enzymatic activity of the Na | 03-03-2011 |
20140200346 | Novel Process for the Synthesis of 7-Chloro-4-(piperazin-1-yl)-quinoline - The present invention provides a new process of synthesis of a polymorph of 7-chloro-4-(piperazin-1-yl)-quinoline of Formula I. Said quinoline compound is substantially pure of any impurities. The present invention further provides the use of the above-mentioned polymorph of 7-chloro-4-(piperazin-1-yl)-quinoline in the synthesis of piperaquine or one of its pharmaceutically acceptable salts. | 07-17-2014 |