摘要:
The continuous conduction mode (CCM) boost voltage power factor correction apparatus with an average-current control mode of the present invention uses resettable integrators to integrate the difference voltage signal outputted from the voltage error amplifier and the input current signal obtained from detection. The integration results are then compared to control the duty cycle of the switch. Thereby, the input current and the input voltage in the AC/DC electrical power converter have a proportion relation and their phases are the same as each other. The components used in this control method are simpler than the PFC circuit of the prior art. It is easy to integrate in one chip with fewer pins. The apparatus of the present invention has a high power factor and a low total harmonic distortion (THD).
摘要:
The continuous conduction mode (CCM) boost voltage power factor correction apparatus with an average-current control mode of the present invention uses resettable integrators to integrate the difference voltage signal outputted from the voltage error amplifier and the input current signal obtained from detection. The integration results are then compared to control the duty cycle of the switch. Thereby, the input current and the input voltage in the AC/DC electrical power converter have a proportion relation and their phases are the same as each other. The components used in this control method are simpler than the PFC circuit of the prior art. It is easy to integrate in one chip with fewer pins. The apparatus of the present invention has a high power factor and a low total harmonic distortion (THD).
摘要:
A high-speed PWM control apparatus with adaptive voltage position and a driving signal generating method thereof is provided. The present invention automatically detects a change in the loading and adjusts the voltage position instantaneously for stabilizing the voltage and reducing the loading output power consumption. The present invention does not require a clock signal to generate a driving signal and does not require an error amplifier to control the modulation. Therefore, the present invention has a fast transient response that responds to the change of the loading instantaneously and has a stabilizing effect. When the apparatus is on a continuous conduction mode (CCM), the switching frequency of the controller is still fixed even though the input voltage Vin and the output voltage Vout are changed. The electrical-magnetic noise disturbance is improved.
摘要:
An integrated circuit includes a first diffusion area for a first type transistor. The first type transistor includes a first drain region and a first source region. A second diffusion area for a second type transistor is separated from the first diffusion area. The second type transistor includes a second drain region and a second source region. A gate electrode continuously extends across the first diffusion area and the second diffusion area in a routing direction. A first metallic structure is electrically coupled with the first source region. A second metallic structure is electrically coupled with the second drain region. A third metallic structure is disposed over and electrically coupled with the first and second metallic structures. A width of the first metallic structure is substantially equal to or larger than a width of the third metallic structure.
摘要:
A T-shaped gate structure and method for forming the same the method including providing a semiconductor substrate comprising at least one overlying sacrificial layer; lithographically patterning a resist layer overlying the at least one sacrificial layer for etching an opening; forming the etched opening through a thickness of the at least one sacrificial layer to expose the semiconductor substrate, said etched opening comprising a tapered cross section having a wider upper portion compared to a bottom portion; and, backfilling the etched opening with a gate electrode material to form a gate structure.
摘要:
A frequency jitter generator and a frequency jitter PWM controller are provided for overcoming the shortcoming that a conventional PWM controller reduces the electromagnetic interference issue by means of varying the operating frequency of the PWM controller based on an input voltage, while resulting in the uncertainty of the range of frequency jitter and the difficulty circuit design due to the effect of the input voltage and the load. The frequency jitter generator and PWM controller adjust the range of frequency jitter by using a signal within a fixed voltage range. The invention not only gets rid of the effect of the input voltage and the loading, but also simplifies the circuit design by fixing the range of frequency jitter no greater than a predetermined percentage regardless of the operating frequency of the PWM controller.
摘要:
A method to reduce the inverse narrow width effect in NMOS transistors is described. An oxide liner is deposited in a shallow trench that is formed to isolate active areas in a substrate. A photoresist plug is formed in the shallow trench and is recessed below the top of the substrate to expose the top portion of the oxide liner. An angled indium implant through the oxide liner into the substrate is then performed. The plug is removed and an insulator is deposited to fill the trenches. After planarization and wet etch steps, formation of a gate dielectric layer and a patterned gate layer, the NMOS transistor exhibits an improved Vt roll-off of 40 to 45 mVolts for both long and short channels. The improvement is achieved with no degradation in junction or isolation performance. The indium implant dose and angle may be varied to provide flexibility to the process.
摘要:
A method and an architecture for accessing hardware devices in a computer system and the chipset thereof are provided. A bi-directional two-wired serial interface, for instance, a system management bus (SMB), is configured to connect an I/O device, such as a local area network adapter, to a system controller such as a southbridge or a northbridge chipset. The I/O device which includes a SMB master controller serves as a SMB master device for generating a clock signal and transmitting a data signal defined by the SMB protocol to the system controller according to the clock signal. The system controller which includes a PCI master and a SMB slave controller serves as a SMB slave device for receiving commands and data bytes in the data signal from the SMB master device to drive the PCI master to access the register block of peripherals and system memory of the computer system.
摘要:
Dynamic Random Access Memory (DRAM) cells are formed in a P well formed in a biased deep N well (DNW). PMOS transistors are formed in N wells. The NMOS channels stop implant mask is modified not to be a reverse of the N well mask in order to block the channels stop implant from an N+ contact region used for DNW biasing. In DRAMs and other integrated circuits, a minimal spacing requirement between a well of an integrated circuit on the one hand and adjacent circuitry on the other hand is eliminated by laying out the adjacent circuitry so that the well is located adjacent to a transistor having an electrode connected to the same voltage as the voltage that biases the well. For example, in DRAMs, the minimal spacing requirement between the DNW and the read/write circuitry is eliminated by locating the DNW next to a transistor precharging the bit lines before memory accesses. One electrode of the transistor is connected to a precharge voltage. This electrode overlaps the DNW which is biased to the same precharge voltage. This electrode provides the DNW N+ contact region.
摘要:
An MOSFET device is fabricated with a plurality of conductors capacitively coupled to a first electrode, forming a mask on the surface of the first electrode exposing a predetermined zone of the first electrode, doping the first electrode through the mask, removing the mask from the surface of the first electrode, oxidizing the first electrode to form a layer of oxide over the first electrode with a thicker layer of oxide over the predetermined zone and a thinner layer of oxide elsewhere, forming at least one electrode over the first electrode on the thinner layer of oxide outside of the zone and forming at least one other electrode over the first electrode on the thicker layer of oxide inside the zone, whereby the one electrode and the other electrode have substantially different capacitive coupling to the electrode.