Abstract:
An exemplary power supply circuit configured for supply power for a load includes: a main power supply configured for converting received voltages into required direct current voltages; a microprocessor configured for providing control signals; a stand-by control circuit configured for controlling the main power supply; an energy storage circuit configured for supplying the stand-by control circuit. When the load stops operating, the microprocessor outputs a control signal to the stand-by control circuit, the stand-by control circuit outputs a corresponding control signal to turn off the main power supply. In response to when the load starts operating, the stand-by control circuit outputs a corresponding control signal to turn on the main power supply, and the main power supply charges the energy storage circuit.
Abstract:
An embodiment of the invention provides a memory array including a plurality of bit lines, a plurality of memory cells and a device. Each of the plurality of memory cells has a first node, a second node and a third node, wherein the third node is coupled to one of the plurality of bit lines. The device couples the plurality of bit lines together to form a common node for one of the plurality of memory cells.
Abstract:
A NROM memory device includes an array of memory cells and first and second bit lines. The first and second bit lines are coupled to opposite sides of the memory cells. During an erase operation, one of the sides of the memory cells receives a positive voltage and the other side couples to a common node or a limited current source. Methods are also disclosed that can easily screen for marginal memory cells based on a threshold voltage distribution of the memory cells.
Abstract:
An exemplary power supply circuit configured for supply power for a load includes: a main power supply configured for converting received voltages into required direct current voltages; a microprocessor configured for providing control signals; a stand-by control circuit configured for controlling the main power supply; an energy storage circuit configured for supplying the stand-by control circuit. When the load stops operating, the microprocessor outputs a control signal to the stand-by control circuit, the stand-by control circuit outputs a corresponding control signal to turn off the main power supply. In response to when the load starts operating, the stand-by control circuit outputs a corresponding control signal to turn on the main power supply, and the main power supply charges the energy storage circuit.
Abstract:
In accordance with one embodiment of the invention, a memory device comprises an array of memory cells arranged into word lines and bit lines, with a sense amplifier and a plurality of reference cells for each bit line. The sense amplifier for a bit line compares the output of a memory cell for that bit line with the output of one of the plurality of reference cells for that bit line.
Abstract:
A memory device is disclosed that includes a plurality of word lines and a plurality of memory cells operating in one of a plurality of modes and coupled to at least one of the word lines. The memory device also includes a plurality of reference lines and reference cells. Each reference cell corresponds to one of the operating modes, supplies a reference current for the corresponding mode, and is coupled to at least one of the reference lines. A reference cell current from a reference cell can also be compared to a target range and, if outside the target range, the voltage level on a corresponding referece line can be adjusted accordingly such that the reference current falls within the target range (i.e., reference current trimming).
Abstract:
A method for removing a photoresist layer from a semiconductor substrate following a conventional dry etching step. A first wet chemical treatment strips the photoresist. A second dry ash with oxygen plasma completes the photoresist removal. To assure complete removal of photoresist imbedded on or within the material underlying the photoresist film, the semiconductor substrate is preheat treated to a temperature in the range of 150 to 250 degrees Centigrade to release the photoresist prior to the second dry ash with oxygen plasma operation. In particular, this method eliminates photoresist extrusion defects from occurring during a bond pad alloy operation.
Abstract:
A power supply control circuit includes a standby control circuit, a microprocessor, and a power supply main circuit. The standby control circuit generates a pulse signal, outputs a first control signal, and sets the first control signal to an active state upon actuation of the switch member. The microprocessor outputs and sets a second control signal to first and second states upon first and second generations of the pulse signal, respectively. The standby control circuit maintains the first control signal at the active state when the second control signal is set to the first state, and sets the first control signal to an inactive state when the second control signal is set to the second state. The power supply main circuit outputs a power when the first control signal is set to the active state, and cuts off the power when the first control signal is set to the inactive state.
Abstract:
A NROM memory device includes an array of memory cells and first and second bit lines. The first and second bit lines are coupled to opposite sides of the memory cells. During an erase operation, one of the sides of the memory cells receives a positive voltage and the other side couples to a common node or a limited current source. Methods are also disclosed that can easily screen for marginal memory cells based on a threshold voltage distribution of the memory cells.
Abstract:
A backlight protection circuit includes a driving circuit, two lamps, a pulse modulator, and a feedback circuit. The pulse modulator controlling the operating state of the driving circuit includes an over-voltage sampling end. Each of the two lamps includes a high voltage end connected to the driving circuit, and a low voltage end connected to the over-voltage sampling end through the feedback circuit. The pulse modulator stops the operation of the driving circuit when the voltage of the low voltage end exceeds a reference voltage.