摘要:
A voltage level shifting device includes an activation or deactivation control input, first and second output nodes, a capacitor coupled between the output nodes, a high-voltage transistor for charging the capacitor, a high-voltage transistor for discharging the capacitor, a comparator which generates a charge blocking signal and a discharge signal, and a control device which is operative to cause the charging transistor to be blocked when a charge blocking signal is generated and to turn on the discharging transistor upon receipt of a deactivation control signal and when a discharge signal is generated.
摘要:
A driver circuit is improved in drive capability corresponding to a resolution increase for a CCD sensor while suppressing chip size of a driver circuit. A preceding-stage circuit, operating on VDD2 (>VDD) and VLOW2 (
摘要:
The present invention provides a display device which is capable of fetching input signals of a small amplitude into the inside thereof. A level converting circuit includes a first-conductive-type first transistor having a gate electrode to which input signals are applied through a first capacitive element, a second-conductive-type second transistor having a gate electrode to which input signals are applied through a second capacitive element, a first bias circuit which applies a first bias voltage to the gate electrode of the first transistor and a second bias circuit which applies a second bias voltage to the gate electrode of the second transistor. Here, the first bias voltage is a voltage which turns off the first transistor when a voltage applied to the gate electrode of the first transistor assumes a maximum value and the second bias voltage is a voltage which turns off the second transistor when a voltage applied to the gate electrode of the second transistor assumes a minimum value.
摘要:
A voltage level transferring circuit is provided for transferring an input signal oscillating between a high original voltage level and a low original voltage level in a signal input terminal to a target signal oscillating between a high target voltage level and a low target voltage level in a signal output terminal. The circuit includes a voltage pull-up set including a plurality of transistor switches to pull up the voltage from the high original voltage level to the high target voltage level, and a voltage pull-down set including a plurality of transistor switches to pull down the voltage from the low original voltage level to the low target voltage level.
摘要:
A drive circuit includes: a first level shift circuit outputting a potential higher than an input potential by a prescribed voltage; a pull-up circuit outputting a potential lower than an output potential of the first level shift circuit by the prescribed voltage to an output node; a second level shift circuit outputting a potential lower than the input potential by the prescribed voltage; a pull-down circuit outputting a potential higher than an output potential of the second level shift circuit by the prescribed voltage to output node; and a capacitor connected between output nodes of the first and second level shift circuits. Accordingly, a through-current is reduced.
摘要:
Disclosed herein are a clock driver circuit and a method of routing clock interconnect lines, which control the lengths of adjacent interconnect lines and ununiformity of conductive line capacitance due to the intersection of interlayer interconnect lines, thereby reducing clock skews. The clock driver circuit comprises an input terminal to which a single-phase clock signal is inputted, an initial-stage clock driver circuit which is connected to the input terminal and which converts the single-phase clock signal to positive-phase and anti-phase clock signals, an intermediate clock driver circuits which respectively relay the positive-phase and anti-phase clock signals outputted from the initial-stage clock driver circuit, a final-stage clock driver circuits which respectively convert the positive-phase and anti-phase clock signals relayed by the intermediate clock driver circuits to single-phase clock signals, and a pair of interconnect lines which respectively connect between the initial-stage clock driver circuit and the final-stage clock driver circuits through the intermediate clock driver circuits and transmit positive-phase and anti-phase clock signals. The interconnect lines are placed as adjacent to each other.
摘要:
A signalling system adapted for digital signals includes a signal transmitter, a signal receiver and a connection which connects the transmitter to the receiver. The transmitter includes an output buffer which has at least one transistor connected to the lowest level of a signal supply voltage, such as to "0" potential or earth potential. Driving or steering of the transistor in response to a received control signal causes the transistor to switch from a state of high impedance to a state of low impedance which exhibits resistive or at least predominantly resistive properties, such as to form an information-carrying output signal. A first of two series-connected transistors is connected to the lowest level of the signal supply voltage, for instance "0" or earth potential, and the other transistor is connected to the signal supply voltage. A connection conductor on which the information-carrying signal is transmitted is connected between the transistors. The transistors are brought to different states simultaneously, and in a state of low-impedance, the impedance value corresponds to the impedance value (the resistance value) of the connection.
摘要:
An electronic system includes a plurality of electronic circuits each having a signal input and output function, a bus to which the plurality of electronic circuits are connected, first termination resistors connected to ends of the bus, and a termination voltage circuit having a first part generating a first voltage and a second part generating a second voltage. The sum of the first voltage and the second voltage is supplied, as a power supply voltage, to output circuits of the plurality of electronic circuits connected to the bus. The second voltage is supplied to the first termination resistors as a termination voltage.
摘要:
The data input/output circuit for full duplex communication includes a data accepting and sending circuit which has an input/output terminal connected to a processor provided within a digital apparatus, and which receives data from the processor, transmits the data and receives outside data through the input/output terminal, a reference circuit which divides a voltage level of the data transmitted from the data accepting and sending circuit and produces a divided voltage level, a differential receiving circuit which has one input terminal connected to the input/output terminal and another input terminal connected to the reference circuit, and which is not operated by a zero voltage difference between the input terminals when the data is transmitted from the input/output terminal but operated by a voltage difference between the input terminals when the data is received through the input/output terminal, the data being supplied to the processor of the digital apparatus, a reference circuit for generating an output impedance value of the data accepting and sending circuit, and a voltage regulation circuit for adjusting a power supply voltage to be applied to the data accepting and sending circuit so that the output impedance value is changed in accordance with the value of the output impedance. This data input/output circuit can be incorporated in an LSI of CMOS transistor structure and has a simple circuit arrangement capable of impedance matching with the transmission path.
摘要:
Data to be processed are transferred by connecting a one-way element having a reduced parasitic capacitance such as the Schottky diode between an output MOSFET having an open drain structure and an output terminal to be connected with a bus line terminated by an impedance element.