摘要:
A power management device of a touchable control system includes a boost circuit, a storage circuit, a detection circuit and a loading circuit. The boost circuit has an output terminal and generates an output voltage. The storage circuit electrically connects to the output terminal of the boost circuit and stores the output voltage. The detection circuit electrically connects to the storage circuit so as to detect the output voltage. The loading circuit electrically connects or disconnects to the output terminal of the boost circuit according to a predetermined value of the output voltage.
摘要:
A frequency control system includes a power generating circuit and a frequency generating circuit. The power generating circuit includes an up transistor circuit, a down transistor circuit and a capacitor for generating a stable voltage. The frequency generating circuit includes a digital-to-analog converter (DAC), a current source/sink circuit, a voltage-controlled oscillator (VCO) and a digital controller. The DAC receives the stable voltage as a power, the current source/sink circuit receives an analog signal from the DAC, the VCO receives a control voltage from the current source/sink circuit, and the digital controller receives a frequency signal from the VCO and a reference signal, according to which a digital signal is generated and fed to the DAC.
摘要:
The present invention provides an integration and analog to digital conversion circuit sharing common capacitors. The circuit comprises a first capacitor array module, a second capacitor module, an integration circuit, an analog to digital conversion (ADC) logic. The first capacitor array module has a plurality of capacitors. The second capacitor array module has a plurality of capacitors. The integration circuit is configured to integrate an analog signal by said first or said second capacitor array module. The ADC logic is configured to convert the output of said first or said second capacitor array module to a digital signal. The ADC logic performs conversion by said first capacitor array module while said integration circuit performs integration by said second capacitor array module, and said ADC logic performs conversion by said second capacitor array module while said integration circuit performs integration by said first capacitor array module.
摘要:
A signal transmit (TX) channel integrated with electrostatic discharge (ESD) protection includes a transmit switch having a first end coupled to receive a transmit signal, and being controlled by an associated scanning signal such that the transmit switch is closed to pass the transmit signal at a specific time; and an ESD protection circuit having a first input end electrically coupled to a second end of the transmit switch and a second input end coupled to receive the associated scanning signal.
摘要:
A signal sensing circuit converts a received current input into a voltage output and provides the voltage output to an analog-to-digital converter (ADC) to generate a digital output signal. The voltage output is associated with a circuit having a first reference impedance, and a reference voltage of the ADC is associated with a circuit having a second reference impedance, wherein the circuit having the first reference impedance and the circuit having the second reference impedance are formed by the same material, so that the ratio between the changes in the current input and the changes in the value of the digital output signal is a constant.
摘要:
The present invention provides an integration and analog to digital conversion circuit sharing common capacitors. The circuit comprises a capacitor array module, an integration circuit, and an analog to digital conversion (ADC) logic. The capacitor array module has a plurality of capacitors. The integration circuit is configured to integrate an analog signal by the capacitor array module. The ADC logic is configured to convert the output of the capacitor array module to a digital signal.
摘要:
A fingerprint identification chip with enhanced ESD protection includes receiving pads disposed on a surface of a chip and arranged in a matrix format. The receiving pad has a central region and a peripheral region which surrounds at least an edge of the central region. The peripheral region of the receiving pad is higher than the central region.
摘要:
The present invention provides a recording method of touch information timing. The method comprises receiving a first touch point information, determining whether the first touch point is the beginning point of a trace; and recording a first timing with respect to the receiving of the first touch point information if the first touch point is the beginning point of the trace.
摘要:
An ESD protection device structure compatible with CMOS process is disclosed. In the ESD protection device structure, a power source I/O unit or a signal I/O unit of an I/O circuit is electrically connected to an electrostatic discharge clamp circuit including multiple low-voltage PMOS structure are formed in the P-type substrate and connected in series. Source and gate on low voltage N-type well of first low-voltage PMOS structure are electrically connected to a high-voltage power terminal pad through a first power line, or electrically connected to a signal transmission terminal pad through a signal transmission line, and drain of final low-voltage PMOS structure is electrically connected to a high voltage ground terminal pad through second power line. The ESD protection device structure using the serially-connected low-voltage PMOS structures only, can use the circuit layout area more efficiently and provide high ESD tolerance.
摘要:
The present invention provides a recording method of touch information timing. The method comprises receiving a first touch point information, determining whether the first touch point is the beginning point of a trace; and recording a first timing with respect to the receiving of the first touch point information if the first touch point is the beginning point of the trace.