PMOSFET(4)与参考电阻器(5)串连,并且PMOSFET(4)形成电流镜像电路. PMOSFET (4) and the reference resistor (5) in series, and PMOSFET (4) forming a current mirror circuit. 负载电路(9)与PMOSFET(8)串连,PMOSFET(8)与PMOSFET(4)组合形成镜像电路. A load circuit (9) and PMOSFET (8) in ...
Constant current circuit A constant current circuit is provided which is capable of feeding a constant current to a load connected in series with the source-drain path of a load drive MOSFET. The circuit employs a current mirror comprising first and second P cha... H Suzuki,M Kurihara - US...
The constant-current power supply circuit comprises a controller, a MOSFET (metal-oxide semiconductor field effect transistor), a current-feedback resistor, a transformer, a diode and an output capacitor, wherein the controller comprises an oscillator, a RS (reset-set) flip-flop and comparators....
A constant current source is provided by a circuit of two metal oxide semiconductor field effect transistors (MOSFET) of the enhancement type having opposite conductivities. One transistor constitutes an input transistor. The other transistor is the output transistor. The drain terminals are connected ...
New Original DSPIC30F2010-20I/SP DSPIC30F2010-20I DSPIC30F2010-20 DSPIC30F2010 Microcontroller IC Integrated Circuit DIP-28 $0.10 - $1.00 Min. order: 1 piece PINWEI Mini AC-DC 110V 120V 220V 230V To 5V Converter Board Module Power Supply Isolated Switch Power Module ...
the drain transistor drain coupled to the output of the driver circuit; first and second switches, coupled to the source transistor gate of the pFET device and the nFET device, respectively, for turning on and off current flow from the voltage source V through the source transistor of the pFE...
A PMOSFET in series with the reference resistor and a PMOSFET forms a current mirror circuit. A load circuit is connected in series with a PMOSFET which forms a mirror circuit in combination with the PMOSFET . When the potential Vn is higher than the reference potential Vr, the source-...
These circuits are a must for operating high-power light emitting diode (LED) arrays. The circuit above is simple, can be a little unstable due to temperature drift with Q1 causing the current drift. That problem is minor compared to power supply drift can cause far greater instability. ...
A new single stage, single switch input current shaping circuit features substantially reduced turn-on switching losses of the switch in the flyback-converter. In this technique, the turn-on switching losses due to the discharge of the o... MM Jovanovic,L Huber - US 被引量: 143发表: 1999...
Tthe output enable/disable function coupled with an internal dimming drive circuit provides high speed PWM dimming through the use of an external MosFET placed at the LED load. When designing, the maximum attainable LED cur- rent is not internally limited because the LM3424 is a con- troller....