摘要:
A phase converter for converting single-phase power to three-phase power, wherein the single-phase power is provided at a first and a second single-phase power terminal and the three-phase power is provided to a first, a second and a third three-phase power terminal, the phase converter comprising: a first power transfer means for coupling the first single-phase power terminal to the first three-phase power terminal; a second power transfer means for coupling the second single-phase power terminal to the second three-phase power terminal; and an inverter coupled to receive power from the first and second single-phase power terminals. The inverter provides power to the third three-phase power terminal and a neutral output by phase shifting its input power by ninety degrees.
摘要:
An operational amplifier is disclosed which is capable of handling input voltages in excess of 200 volts, comprising at least in the input stage thereof a plurality of low voltage transistors including at least a pair of low voltage lateral PNP transistors each having two collectors. These lateral PNP transistors act as level shifters for the amplifier and also a bias arrangement for the input stage. A single high voltage lateral PNP is in the signal path providing the lowest pole in the transfer function and to compensate for low to medium loop gains.
摘要:
Push-pull circuits are described that are suitable for the driving of LEDs and that reduce the voltage stress on the switching transistors that is caused by the output transformer. The push-pull arrangement caters to reducing the size of the transformer as it eliminates the DC magnetic bias of the transformer core and it also caters to the integration of the semiconductor content of the circuit requiring only low side DMOS to be implemented in the monolithic, junction isolated process.
摘要:
A high voltage DMOS half-bridge output for various DC to DC converters on a monolithic, junction isolated wafer is presented. A high-side lateral DMOS transistor is based on the epi extension diffusion and a five layer RESURF structure. The five layers are made possible by the epi extension diffusion which is formed by a suitable n-type dopant diffused into a p-type substrate and it is the same polarity as the epi. The five layers, starting with the p-type substrate, are the substrate, the n-type epi extension diffusion, a p-type buried layer, the n-type epi and a shallow p-type layer at the top of the epi. The epi extension is also used to shape the electric field by a specific lateral distribution and make the lateral and vertical electric fields to be the smoothest to avoid electric field induced breakdown in the silicon or oxide layers above the silicon.
摘要:
A solid state relay uses an optically controlled shunt and series enhancement circuit between a photodiode array and an output device to provide enhanced turn-off and transient immunity characteristics. A Faraday shield may be used to cover optically active components and to provide protection against false turn-on and turn-off caused by the transients.
摘要:
The inverter buffer circuit disclosed includes two transistorized circuits each coupled to an input circuit and an output circuit capable of carrying high current and providing full output swing between a high voltage or binary "1" and a low voltage or binary "0". Each of the two circuits include a first enhancement field effect transistor having its drain electrode connected to a drain voltage and operating as a source follower, a first depletion field effect transistor having its drain electrode and source electrode connected to back bias acting as a load for the first enhancement transistor, second and third enhancement field effect transistors having their source electrodes coupled to the back bias and interconnected to form a flip-flop controlled by the first enhancement transistor and a second depletion field effect transistor having its drain electrode coupled to the drain voltage and acting as the load for the flip-flop. The output circuit includes two depletion field effect transistors connected in series between the drain voltage and source voltage with the gate electrodes thereof connected to a different one of the two flip-flops and an output terminal coupled to the series connection between the two depletion transistors. Three embodiments of the input circuit are disclosed.
摘要:
A circuit arrangement to provide a fixed voltage source in series with an arbitrarily chosen impedance of any magnitude and phase shift having very low power dissipation and capable of being fabricated on silicon integrated chips is disclosed. The circuit arrangement includes a sensing resistor to sense the output current of a power converter which is amplified and fed back with an appropriate phase shift to control the output voltage of the converter. An independent control signal may be combined with the fed back voltage to change the chosen impedance to another type of impedance.
摘要:
A high voltage DMOS half-bridge output for various DC to DC converters on a monolithic, junction isolated wafer is presented. A high-side lateral DMOS transistor is based on the epi extension diffusion and a five layer RESURF structure. The five layers are made possible by the epi extension diffusion which is formed by a suitable n-type dopant diffused into a p-type substrate and it is the same polarity as the epi. The five layers, starting with the p-type substrate, are the substrate, the n-type epi extension diffusion, a p-type buried layer, the n-type epi and a shallow p-type layer at the top of the epi. The epi extension is also used to shape the electric field by a specific lateral distribution and make the lateral and vertical electric fields to be the smoothest to avoid electric field induced breakdown in the silicon or oxide layers above the silicon.
摘要:
A circuit for discharging of a photovoltaic power source has a first and a second terminal and the circuit comprises a discharge circuit which is connected between the first and second terminal of the power source which comprises a controllable current source which is controlled by a band gap reference.
摘要:
A high-power solid state relay uses optically-controlled shunt and series solid state switches between a photodiode array and an output device to provide enhanced turn-off and transient immunity characteristics and an optically-controlled charging network connected to the switched load to enhance the turn-on characteristics of the relay.