摘要:
An output buffer circuit includes a high voltage detecting circuit, a dynamic gate bias generating circuit, an output stage circuit and a pad voltage detector. The high voltage detecting circuit detects a power supply voltage and generates a first and a second determining signals and a first and a second bias voltages according to the power supply voltage. The dynamic gate bias generating circuit is biased by the first and the second bias voltages and receives the first and the second determining signals, for converting logic control signals into corresponding gate bias voltages according to the first and the second determining signals. The pad voltage detector detects a voltage of an I/O pad and provides a pad voltage detecting signal for the output stage circuit to modify an output signal outputted to an I/O pad. A mixed-voltage input/output (I/O) buffer is disclosed herein.
摘要:
A clock generating device includes: a frequency divider having an input node coupled to a transmission interface for generating a reference clock signal according to an input data received from the transmission interface; and a clock/data recovery circuit having a data input node coupled to the transmission interface and a reference clock input node coupled to an output node of the frequency divider, for generating an output clock signal according to one of the input data received at the data input node and the reference clock signal received at the reference clock input node.
摘要:
In a device for separating a synchronous signal in a video signal, a capacitor receives the video signal to obtain a coupling signal, a level determining circuit receives the coupling signal and compares a voltage level of the coupling signal with a number of reference voltages. The reference voltages define several reference voltage ranges, one of which is a predetermined reference voltage range. The level determining circuit outputs an adjusting signal according to a reference voltage range corresponding to a minimum voltage level of the coupling signal within a predetermined time period. A level adjusting circuit has several current sources for receiving the adjusting signal and thus controls the current sources to adjust a DC level of the coupling signal. A synchronous signal separating circuit separates the synchronous signal from the coupling signal when the minimum voltage level of the coupling signal is substantially within the predetermined reference voltage range.
摘要:
The present invention generally relates to a high matching precision organic light emitting diode (OLED) driver by using a current-cascaded method, and more particularly, to a method in which the current-cascaded method is used so as to reduce the driving current mismatching brought about by the drifting in the parameters during different fabrication procedures, and thus improve the display quality. Among the plurality of driving integrated circuits (IC's), the internal circuit of each IC comprises a first operational amplifier, the output of which is connected to a plurality of output transistors that are further connected to a current mirror. The outputs of said plurality of output transistors are connected to other plurality of driving IC's respectively so as to achieve output current matching between other driving IC's.
摘要:
A buffer circuit applied to a source driver output stage circuit includes a buffer and a D-class amplifier. The buffer is coupled to an input voltage for accordingly outputting an output voltage. The D-class amplifier includes a comparator and a switch device. The comparator is for comparing the input voltage and the output voltage and accordingly outputting a comparison signal. The switch device is coupled to an operational voltage for adjusting the output voltage according to the comparison signal.
摘要:
The present invention provides an image sensor and a fabricating method thereof capable of approaching higher quantum efficiency and reducing cost. The method comprises: providing a substrate; forming a pixel region on a top surface of the substrate; forming an interlayer insulating layer and at least a metal line on the pixel region; forming an isolation carrier layer having a hole array therein on the interlayer insulating layer; grinding a lower surface of the substrate to reduce the thickness of the substrate; placing a plurality of conductors into the hole array to form a plurality of bumps on the isolation carrier layer.
摘要:
A driving circuit includes at least a driving unit, a first processing unit and a second processing unit. The driving circuit includes a first bias component, a second bias component, a first pre-emphasis unit, a second pre-emphasis unit, and a transmitter unit. The first bias component has a first node coupled to a first reference voltage and a second node for outputting a first bias current. The second bias component has a first node for draining a second bias current and a second node coupled to a second reference voltage different from the first reference voltage.
摘要:
A phase-locked loop circuit for generating an output signal includes a phase frequency detector (PFD), a processing module, and a clock generator. The PFD is implemented for generating a plurality of indicating signals according to a first reference signal and a feedback signal, where the feedback signal is generated according to the output signal. The processing module is coupled to the PFD, and is implemented for generating a control signal according to the indicating signals and a plurality of clock signals, where the clock signals have an identical frequency but different phases. The clock generator is coupled to the processing module, and is implemented for generating the clock signals according to the control signal. The output signal is generated according to a specific clock signal selected from the clock signals.
摘要:
A clock generating device includes: a frequency divider having an input node coupled to a transmission interface for generating a reference clock signal according to an input data received from the transmission interface; and a clock/data recovery circuit having a data input node coupled to the transmission interface and a reference clock input node coupled to an output node of the frequency divider, for generating an output clock signal according to one of the input data received at the data input node and the reference clock signal received at the reference clock input node.
摘要:
The device for jitter measurement and a method thereof are provided. The device for jitter measure includes a signal retrieving module, a signal amplifying module, an edge detecting module, and a time-to-digital converting module. The signal retrieving module receives a signal-under-test, and retrieves a first pulse signal having a pulse width equal to a period of the signal-under-test. The signal amplifying module amplifies the pulse width of the first pulse signal and thereby generates a second pulse signal. The edge detecting module detects a rising edge and a falling edge of the second pulse signal, and generates a first indication signal and a second indication signal according to the respective detected results. The time-to-digital converting module converts the pulse width of the second pulse signal existed in time domain to a digital signal according to the first indication signal and the second indication signal.