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SAMPLE PAPER 2011-12
SAMPLE PAPER 2011-12

Electricity & Magnetism
Electricity & Magnetism

... There are 2 types of circuits: Circuit – there are several branching paths to the components. If the circuit is broken at any one branch, only the components on that branch will turn off. ...
Triangle to Sine Conversion (Nonlinear Function Fitting)
Triangle to Sine Conversion (Nonlinear Function Fitting)

... to correspond to a half-cycle of a periodic function by applying a triangular waveform. This is illustrated below; the triangular wave is applied as the base signal of the differential pair, with the peak values ±Vm selected appropriately . If the periodic function so formed is expanded in a Fourier ...
Victron Skylla-i 24/80 (1+1) Skylla-i (1+1): Two Outputs to charge 2
Victron Skylla-i 24/80 (1+1) Skylla-i (1+1): Two Outputs to charge 2

DC/DC Converter
DC/DC Converter

... Design Reference 1. Typical application All the DC/DC converters of this series are tested according to the recommended circuit (see Fig. 2) before delivery. If it is required to further reduce input and output ripple, properly increase the input & output of additional capacitors Cin and Cout or sel ...
The Exact Equivalent Circuit of a Transformer
The Exact Equivalent Circuit of a Transformer

10W Epistar 35mil Chip High Power LED White
10W Epistar 35mil Chip High Power LED White

Supercapacitor-Based Power Backup Prevents Data Loss in RAID
Supercapacitor-Based Power Backup Prevents Data Loss in RAID

Figure (1): Model of the speaker system.
Figure (1): Model of the speaker system.

... then goes through an amplifier to control the current (which is constant in our case) of the system. A multi-meter is used to measure the output voltage (voltage of speaker). A sensor is used to detect the position displacement of the speaker and it’s connected to a computer to observe the output. ...
Homework 7
Homework 7

... impedance of the inductor is 90°. Supplement. Although it is not asked in the problem, let's see in scale the relationship between the current (common for all elements) and the voltages in the circuit. Let's assume that the current has value of 20 mA and at a certain instant t it is represented by t ...
HW8
HW8

... 3. A transformer is supplying power to a neon sign. These are special transformers called ballasts. The neon tube is basically an open circuit when we turn on the power. If we can apply a high voltage (~10 kV) the tube breaks down and we have approximately a short circuit and the gas glows. We have ...
2SB1731
2SB1731

... BASE SATURATION VOLTAGE : VBE (sat) (V) COLLECTOR SATURATION VOLTAGE : VCE (sat) (V) ...
FML9
FML9

... No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Up ...
Piezotron® Coupler
Piezotron® Coupler

... excitation required by low impedance, voltage mode sensors with built-in electronics (i.e. Piezotron®, PiezoBeam®, K-Shear®, and Ceramic Shear) or for high impedance sensors with an external impedance converter. Sensor power is supplied by the same 2-wire cable that provides the low impedance output ...
No. CIHT:JAL:P:499(Vol.iv): Dated: / / 2010 (In reply, please quote
No. CIHT:JAL:P:499(Vol.iv): Dated: / / 2010 (In reply, please quote

... -307. (a) The tender / quotation must accompany demand draft / pay order amounting Rs.2,000/(Rupees Two Thousand only) in the name of the Principal Director, Central Institute of Hand Tools payable at Jalandhar towards lumpsum amount of Earnest Money (Refundable). The Earnest Money must be attached ...
5. Current Sharing In Power Arrays
5. Current Sharing In Power Arrays

... be designed so that the operator cannot come in contact with dangerous potentials, currents or thermal hazards. It is also essential that when a module fails, the failure is detected and identified by an alarm or notice to provide service. A Hot-Swap system must ensure that during swap out there is ...
What is an effective or a root mean square value of an alternating
What is an effective or a root mean square value of an alternating

... An effective value of an alternating current is root mean square of its instantaneous value over one cycle. This is 1/1.4142 of the peak current value for a normal (= sinusoidal) alternating current. An effective value of an alternating voltage is defined in the same manner. It is 1/1.4142 of the pe ...
Maxim Design Support Technical Documents Application Notes
Maxim Design Support Technical Documents Application Notes

... consume input power and decrease the voltage across the inductor during the charging phase. When the inductor discharges through the diode, power loss proportional to the inductor current also occurs. Switching losses occur during each cycle of the DC-DC converter. The most obvious switching losses ...
High Power GTO AC/DC Current Source Converter with Minimum
High Power GTO AC/DC Current Source Converter with Minimum

... operating conditions where a unity power factor is achievable, this conitrol scheme will automatically adjust delay angle a and modlulation index Mdsuch that Eq. (5) will be satisfied. On the other hand, if a unity power Tactor is not achievable, the modulation index M, will be saturated and delay a ...
Relay coupler
Relay coupler

... The IM73-12-R/24VUC 1-channel relay coupler is particularly suitable for use as a coupling module for the safe galvanic isolation of binary signals. 2 synchronous controlled relays, each with 1 changeover contact are provided at the output. ...
STN9260
STN9260

... #OLLECTOR EMITTERVOLTAGE6CE;6= ...
STEVAL-ISA001V1
STEVAL-ISA001V1

... burst mode during standby operation and therefore, meets Blue Angel norm. Table 2 below outlines the total power consumption measured on the reference board at different line voltages with zero loads at both the outputs. The output voltages remain regulated when operating in burst mode condition. ...
The first test of a transistor
The first test of a transistor

... multimeter. This option sets the terminals of the multimeter so as to forward bias the junction and then to read the voltage across it. For a silicon transistor like the 2N2219 you expect to find a forward voltage of 0.6 or 0.7 volts. Test both the basecollector and the base-emitter junctions of you ...
Voltage Current (electric) Resistance (electric) direct current
Voltage Current (electric) Resistance (electric) direct current

... a device designed to introduce resistance into an electric circuit. ...
Op-Amps and Saturation
Op-Amps and Saturation

< 1 ... 1618 1619 1620 1621 1622 1623 1624 1625 1626 ... 1789 >

Buck converter



A buck converter is a voltage step down and current step up converter.The simplest way to reduce the voltage of a DC supply is to use a linear regulator (such as a 7805), but linear regulators waste energy as they operate by dissipating excess power as heat. Buck converters, on the other hand, can be remarkably efficient (95% or higher for integrated circuits), making them useful for tasks such as converting the main voltage in a computer (12V in a desktop, 12-24V in a laptop) down to the 0.8-1.8V needed by the processor.
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