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AN-6961 Critical Conduction Mode PFC Controller  Description
AN-6961 Critical Conduction Mode PFC Controller Description

... sensing the information on an auxiliary winding of the PFC inductor. As discussed previously, when the ZCD voltage is lower than the threshold voltage (1.75V typical), the PWM output is high again and initiates a new switching cycle. However, there is a prerequisite: the zero-current detector voltag ...
AN-127 LM143 Monolithic High Voltage Operational Amplifier
AN-127 LM143 Monolithic High Voltage Operational Amplifier

... The input stage differential amplifier Q7 and Q8 with large base width exhibit LVCEO = 90V to 110V and high BVEBO so readily withstand input overvoltages. The total input stage collector current (I1 = 80 µA) is made higher than in most op amps to improve slew rate. Emitter degeneration resistors, R1 ...
ZNBG3113Q20TC Datasheet
ZNBG3113Q20TC Datasheet

... temperature range with the associated FETs and gate and drain capacitors in circuit. Capacitors CD and CG ensure that residual power supply and substrate generator noise is not allowed to affect other external circuits which may be sensitive to RF interference. They also serve to suppress any potent ...
ZNBG3113 Datasheet
ZNBG3113 Datasheet

... temperature range with the associated FETs and gate and drain capacitors in circuit. Capacitors CD and CG ensure that residual power supply and substrate generator noise is not allowed to affect other external circuits which may be sensitive to RF interference. They also serve to suppress any potent ...
MM74HC573 3-STATE Octal D
MM74HC573 3-STATE Octal D

... The MM74HC573 high speed octal D-type latches utilize advanced silicon-gate P-well CMOS technology. They possess the high noise immunity and low power consumption of standard CMOS integrated circuits, as well as the ability to drive 15 LS-TTL loads. Due to the large output drive capability and the 3 ...
Higher Unit 1
Higher Unit 1

v - Texas Instruments
v - Texas Instruments

... applied to the Ref terminal should be less than 10Ω to maintain good common-mode rejection. ...
An Analog Current Controller Design for Laser Diodes
An Analog Current Controller Design for Laser Diodes

... Figure 1: Protection and filter circuit, this circuit is located in the laser diode housing. The protection circuit help defend the laser diode from electrocution and the filter is to guard against any high frequency pickup from the power transport lines (twisted pairs) which could cause undesired m ...
Mana tronics 460V / 18 Amp Load For High Voltage UPS Battery Testing
Mana tronics 460V / 18 Amp Load For High Voltage UPS Battery Testing

... The load is continuously rated at 18 Amps at up to 460V DC, i.e. 8.2kW. The standard model comes with Constant Current and Constant Power, Constant Resistance and Constant Voltage modes. The mode selection will be via the front panel. The load current is continuously variable over the entire current ...
ELM337 Light Switch
ELM337 Light Switch

... Operation of the circuit can best be explained as follows. When the ‘start’ pushbutton is pressed, the M2 and M1 pins will both be at a logic low level, while M0 will be high. The LDR input is also at a low level, simulating an LDR that is just ‘seeing’ light. Since the mode is 001 or LLH, then from ...
MAX846A Cost-Saving Multichemistry Battery-Charger System _______________General Description
MAX846A Cost-Saving Multichemistry Battery-Charger System _______________General Description

... resistor (RCS) to a current, and applying this current to an external load resistor (RISET). Set the charge current by selecting RCS and RISET. The charge current can also be adjusted by varying the voltage at the low side of RISET or by summing/subtracting current from the ISET node (Figure 5). The ...
MM74HC574WMX - West Florida Components
MM74HC574WMX - West Florida Components

... at the D inputs, meeting the set-up and hold time requirements, are transferred to the Q outputs on positive going transitions of the CLOCK (CK) input. When a high logic level is applied to the OUTPUT CONTROL (OC) input, all outputs go to a high impedance state, regardless of what signals are presen ...
Electronic Controls
Electronic Controls

Chapter 3
Chapter 3

LM138/LM338 5-Amp Adjustable Regulators
LM138/LM338 5-Amp Adjustable Regulators

... regulation but a few precautions are needed to obtain maximum performance. The current set resistor connected between the adjustment terminal and the output terminal (usually 240Ω) should be tied directly to the output of the regulator (case) rather than near the load. This eliminates line drops fro ...
1 - Mouser
1 - Mouser

... This is no longer true with the ADP3309 anyCAP LDO. It can be used with virtually any capacitor, with no constraint on the minimum ESR. This innovative design allows the circuit to be stable with just a small 0.47 μF capacitor on the output. Additional advantages of the design scheme include superio ...
ch2.2_kirchhoffslaws..
ch2.2_kirchhoffslaws..

1.5A Ultra Low Dropout Linear Regulator TJ3965A
1.5A Ultra Low Dropout Linear Regulator TJ3965A

LSJ689 Application Note - Linear Integrated Systems
LSJ689 Application Note - Linear Integrated Systems

... is an example of a popular topology made practical by the availability of the LSJ689. Net gain without feedback is set to 20dB. In most applications this arrangement would be used with negative feedback. Each long-tailed pair (LTP) is powered by a 2mA current source connected to the appropriate powe ...
Preliminary EUP2618 Triple Adjustable Output TFT-LCD DC-DC Converters
Preliminary EUP2618 Triple Adjustable Output TFT-LCD DC-DC Converters

... DRVN to GND ---------------------------------------------------------- -0.3V to (VSUPN +0.3V) DRVP to GND ----------------------------------------------------------- -0.3V to (VSUPP +0.3V) PGND ,TGND to GND --------------------------------------------------------------------- ±0.3V RDY ,SUPP,SUPN to ...
Measuring e/k
Measuring e/k

... 3. hFE (or β) of a transistor: (http://www.learningaboutelectronics.com/Articles/What-is-hfe-of-a-transistor) hFE of a transistor is the current gain or amplification factor of a transistor. hFE (which is also referred to as β) is the factor by which the base current is amplified. A transistor works ...
Low voltage CMOS quad 2-input NOR gate with 5 V tolerant inputs
Low voltage CMOS quad 2-input NOR gate with 5 V tolerant inputs

... The 74LCX02 is a low voltage CMOS quad 2input NOR gate fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. It is ideal for low power and high speed 3.3V applications; it can be interfaced to 5V signal environment for inputs. ...
Zetex - DN78, ZXSC310 with reverse polarity protection
Zetex - DN78, ZXSC310 with reverse polarity protection

... in the flashlight the wrong way, the reverse polarity can damage the ZXSC310 and switching transistor, Q1. Implementing a mechanical reverse protection method can be expensive, and not always reliable. This paper describes methods of electronic reverse protection, without efficiency loss, for the ZX ...
Bipolar Junction Transistor - AnalogElectronics-CM
Bipolar Junction Transistor - AnalogElectronics-CM

... Prepared by: CESAR MENDOZA-Applied Technology Teacher ...
MJ21193 - Silicon Power Transistors
MJ21193 - Silicon Power Transistors

... IC, COLLECTOR CURRENT (AMPS) ...
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Wilson current mirror



A Wilson current mirror is a three-terminal circuit (Fig. 1) that accepts an input current at the input terminal and provides a ""mirrored"" current source or sink output at the output terminal. The mirrored current is a precise copy of the input current. It may be used as a Wilson current source by applying a constant bias current to the input branch as in Fig. 2. The circuit is named after George R. Wilson, an integrated circuit design engineer who worked for Tektronix. Wilson devised this configuration in 1967 when he and Barrie Gilbert challenged each other to find an improved current mirror overnight that would use only three transistors. Wilson won the challenge.
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