摘要:
A Phase Lock Loop (PLL) with gain control is provided. The PLL has a dual-path configuration, where a first and a second VCO control voltage are generated in response to a phase or frequency difference between a PLL input signal and an output signal. The PLL comprises a dynamic voltage gain control (DVGC) unit and a voltage-to-current (V2I) unit, where the DVGC creates a baseline reference current in response to the first VCO control voltage and the V2I provides a substantially linear current in response to the second VCO control voltage. The currents from the DVGC and V2I are combined and fed into a current-controlled oscillator, which generates a PLL output frequency signal. Frequency gain of the VCO is substantially reduced, thus providing a PLL with improved tuning precision.
摘要:
In the specification and drawing a display module is disclosed. The display module comprises a backboard, a display component and a printed circuit board with at least one locating pin formed thereon. The backboard has at least one locating hole. The display component is disposed on the backboard. The at least one the locating pin is inserted in the locating hole. Moreover, a method for manufacturing the printed circuit board and a method for fabricating the display module are also disclosed in the specification and drawing.
摘要:
A circuit includes a voltage-controlled oscillator (VCO), which includes a voltage input node having an input voltage; and a start-up circuit. The start-up circuit includes a first current path and a second current path. The first current path has a first current and is configured so that the first current increases in response to a decrease in the input voltage and decreases in response to an increase in the input voltage. The second current path has a second current and is configured so that the second current decreases in response to the decrease in the input voltage and decreases in response to the increase in the input voltage. The VCO further includes a third current path combining a first proportion of the first current and a second proportion of the second current into a combined current; and a current-controlled oscillator (CCO) including an input receiving the combined current and outputting an AC signal.
摘要:
The poison-filter material of the invention includes a substrate and a metal oxide. The substrate includes numerous holes, and the metal oxide is adhered to a surface of the substrate and the holes. The method for producing the poison-filter material of the invention includes the following steps of sonicating and impregnating a substrate into a metallic salt aqueous solution; and calcining the substrate to form a metal oxide on a surface of the substrate and numerous holes of the substrate, such that the poison-filter material is produced. In the invention, the metallic salt aqueous solution is fully oscillated to impregnate the porous substrate, and metal oxide is formed on the surface and holes of the substrate after high-temperature calcination. Therefore, the adsorbent material of the invention can effectively adsorb noxious gas and lower penetrability of noxious gas. During the calcination process, the metallic salt aqueous solution of the invention does not generate harmful volatility solvent such as ammonia. Therefore, the invention can prevent the production process from polluting the environment, harming the health of operator, and reduces the cost for recycling harmful volatility solvents.
摘要:
A rotary switch includes a holder base holding two metal contact plates and one metal connection plate, a rotary handle vertically pivotally coupled to a pivot shaft of the holder base and rotatable relative to the holder base between a first position where a bottom recess of a circular actuating member of the rotary handle receives a respective electric connection portion of each metal contact plate and the electric connection portion of the metal connection plate contacts the electric connection portions of the metal contact plates and a second position where a protrusion of the circular actuating member forces the electric connection portion of one metal contact plate away from the metal connection plate to produce an electrical signal, and a torsion spring sleeved on the rotary handle with its two ends respective connected to the actuating member and the holder base for returning the rotary handle automatically after each rotary motion.
摘要:
The invention provides a signal coupling circuit and method for coupling an analog input signal to a processing circuit. The signal coupling circuit includes a number of first coupling units, a second coupling unit and a first multiplexer. The first coupling units are coupled to a first input terminal of the processing circuit, for respectively receiving a plurality of input signals. The first multiplexer is coupled between the first coupling units and the processing circuit for selecting one of the input signals and transmitting the selected input signal to the processing circuit. The second coupling unit is coupled to a second input terminal of the processing circuit, for receiving a common reference signal, wherein the processing circuit uses the common reference signal as reference for processing some or all of the input signals.
摘要:
A method for manufacturing a thin film transistor (TFT) array substrate needs only or even less than six mask processes for manufacturing the TFT array substrate integrated with a color filter pattern. Therefore, the manufacturing method is simpler and the manufacturing cost is reduced. In addition, the manufacturing method needs not to form a contact window in a relative thick film layer such as a planarization layer or a color filter layer, so as to connect the pixel electrode to the source/drain. Thus, the difficulty of the manufacturing process is effectively reduced.
摘要:
The present invention provides a method for driving a backlight module of a liquid crystal display. The backlight module includes three light sources, a first light source, a second light source, and a third light source, that illuminate different color light respectively. The method includes sequentially turning on the three light sources, wherein the first light source and the second light source are turned on twice and the third light source is turned on once.
摘要:
A method for fabricating a SONOS memory is disclosed. First, a semiconductor substrate is provided and a SONOS memory cell is formed on said semiconductor substrate. A passivation layer is deposited on the SONOS memory cell and a contact pad is formed on the passivation layer. Subsequently, an ultraviolet treatment is performed and an annealing process is conducted thereafter.
摘要:
A method for fabricating a SONOS memory is disclosed. First, a semiconductor substrate is provided and a SONOS memory cell is formed on said semiconductor substrate. A passivation layer is deposited on the SONOS memory cell and a contact pad is formed on the passivation layer. Subsequently, an ultraviolet treatment is performed and an annealing process is conducted thereafter.