摘要:
In a semiconductor device, a selector selects a different reference voltage depending on whether the impedance of a transmitter or of a receiver is to be adjusted, and causes a reference voltage generator to generate the selected reference voltage. The reference voltage generator generates the reference voltage selected by the selector and applies the generated reference voltage to an impedance adjuster. The impedance adjuster adjusts the impedance of the transmitter and the impedance of the receiver, separately from each other, in accordance with the input reference voltage.
摘要:
In a semiconductor device, a selector selects a different reference voltage depending on whether the impedance of a transmitter or of a receiver is to be adjusted, and causes a reference voltage generator to generate the selected reference voltage. The reference voltage generator generates the reference voltage selected by the selector and applies the generated reference voltage to an impedance adjuster. The impedance adjuster adjusts the impedance of the transmitter and the impedance of the receiver, separately from each other, in accordance with the input reference voltage.
摘要:
A signal restoration circuit includes a storage configured to store input signals by disposing the input signals in an input order, the input signals being readable from the storage in the disposed order, and a storage controller configured to control delay time from an input of the input signal to an output in the storage based on delay information of the input signal.
摘要:
A digital DLL device is provided which can reduce an error with respect to a target delay amount. The device provides a delay to an input clock signal so as to equally divide a clock cycle T thereof into N parts, and includes first variable delay sections and second variable delay sections, each of which is formed of an arbitrary number of unit delay buffers connected in series with one another. A phase comparison section makes a compare between the phase of the input clock signal and the phase of an output signal which is the input signal having been delayed while passing through all the first and second variable delay sections, and outputs a result of the comparison. A delay control section calculates a total number of unit delay buffers S required based on the phase comparison result, sets a quotient Q of S divided by N to be the number of unit delay buffers for each of the first variable delay sections, and allocates a remainder R of S divided by N to the second variable delay sections, respectively.
摘要:
A termination circuit for terminating a transmission line comprises a resistance unit which is formed by connecting a P-channel type MOS transistor and an N-channel type MOS transistor in parallel, and Thevenin termination is formed by providing this resistance unit between the transmission line and a power supply line and between the transmission line and a ground line.
摘要:
A memory control circuit has a write leveling function and controls read/write operations by supplying a clock signal to a plurality of memories through a clock signal line which is wired to the plurality of memories through daisy chain connection. For each of the plurality of memories, a first variable delay unit delays, in a write operation, a data strobe signal output to the memory by a first delay time that is set by utilizing the write leveling function and a second variable delay unit delays, in a read operation, a data signal input from the memory by a second delay time that is set based on the first delay time.
摘要:
A signal transmission method and a signal transmission device capable of easily transmitting a signal with a small number of signal lines. A data signal of time slot count N+α with bit count N is longitudinal-lateral converted into a data signal of time slot count N with bit count N+α. so as to create a null time α and a control signal is inserted into the null time α, thereby converting the parallel signal containing the data signal and the control signal into a serial signal for transmission.
摘要:
A signal receiving circuit includes a phase detection unit and a delay control unit. The phase detection unit detects a phase difference between a received signal and a clock signal. The delay control unit receives the phase difference, delays a phase of the received signal in a range not exceeding a delay amount determined by using a predetermined phase difference as a unit, and changes, when the phase difference exceeds the predetermined phase difference, a delay amount of the received signal by using the predetermined phase difference as a unit.
摘要:
A driver circuit for driving a device or circuit disposed after it comprises a plurality of driving transistors connected in parallel, a selection unit for selecting one or more groups from a plurality of groups to each of which driving transistors having a power base of two with the same polarity belong and in which the number of driving transistors belonging to each group is different and a driving unit for driving driving transistors belonging to the group selected by the selection unit.
摘要:
An interface circuit which is connected to a function unit such as a memory reduces the number of structural elements by using structural elements in common, and also realizes a plurality of different function circuits. The interface circuit connected with the function unit uses the structural elements for a plurality of circuits in common, and obtains necessary functions by controlling the structural elements. The interface circuit has first and second electronic devices such as FETs connected in series, and an external terminal, formed at an intermediate connected portion between the first electronic device and the second electronic device, to which the function unit is connected, and constitutes a function circuit part having different functions by controlling the first electronic device and the second electronic device.