摘要:
A driver and a receiver supply a data signal, which is based on serial data having a regular bit pattern, such as a clock, which includes 1's and 0's alternating with each other during an adjustment period, and is based on serial data having an arbitrary bit pattern during a transfer period following the adjustment period. A duty factor controller adjusts a data transition characteristic of the driver or the receiver so that a duty factor of the data signal supplied from the receiver is equal to 50% in the adjustment period, and has the adjusted data transition characteristic stored. A clock recovery unit recovers a clock synchronized with a data signal, which is supplied from the receiver in the transfer period and is based on the adjusted transition characteristic, from the data signal.
摘要:
A semiconductor integrated circuit includes an input circuit for taking in signals and an output circuit for outputting signals. The input circuit is so set that the input impedance during input signal transition is lower than the input impedance on other occasions than input signal transition. The output circuit is so set that the driving force during the second half of signal transition is lower than the driving force during the first half of transition. Such setting that the input impedance during input signal transition is lower than the input impedance on other occasions than input signal transition reduces reflected waves during input signal transition. Such setting that the driving force during the second half of signal transition is lower than the driving force during the first half of transition suppresses production of reflected waves during the second half of signal transition. Thus, the necessity for external components, such as damping resistors and terminator resistors, for impedance matching is obviated.
摘要:
A signal transmitting/receiving apparatus according to the present invention includes: a transmitting device for transmitting data; a receiving device for receiving the data; a data line for transmitting the data; and a supply line for transmitting a bias voltage for determining a voltage of the data line, wherein the transmitting device and the receiving device are connected to each other through the data line and the supply line, the transmitting device including: a driver circuit for outputting the data to the data line; and a bias generating means for generating the bias voltage and outputting the bias voltage to the supply line, the receiving device including: a terminating resistor connected to the data line; and a receiver circuit for detecting the data from the data line, wherein the data line is connected to the supply line via the terminating resistor.
摘要:
An IC tag communication relay device is provided with an antenna section, lead lines and input/output unit. The antenna section is equipped with one or more antennas for transmitting and receiving electromagnetic radiation to and from IC tags. The lead lines are connected to each antenna for transmitting electrical signals corresponding to transmitted and received electromagnetic radiation. The input/output unit is arranged outside of the antenna corresponding to each antenna connected to the lead lines.
摘要:
A mask ROM includes bit lines, word lines intersecting with the bit lines and bit cells provided along the word lines, each of the bit lines being formed of a cell transistor having a gate connected to an associated one of the word lines. In the mask ROM, further provided is a source node commonly connected to respective sources of ones of the cell transistors having a gate connected to one of adjacent two word lines. A current flows from a selected bit line to a non-selected bit line via a cell transistor selected in reading out data and the source node.
摘要:
A semiconductor system includes a plurality of memory systems (SARM, ROM, etc.) and circuit systems. The semiconductor system further includes an analog power supply circuit which is common to the memory systems. The analog power supply circuit supplies a source potential to word line drivers of the memory systems. The source potential is set to a potential different from a ground potential and a supply voltage of the semiconductor system.
摘要:
In a CMOS type SRAM device having a 6-transistor configuration, only a drive transistor and an access transistor of one unit circuit are designed with a larger size, with the other four transistors having a smaller size.
摘要:
In order to enhance the sensitivity of a sense amplifier circuit, each one of the transistor pair composing the sense amplifier circuit is formed by transistors connected parallel in an even number of stages, and therefore the sense amplifier circuit is made of transistor pair having an extremely balanced characteristic, cancelling the asymmetricity of current-voltage characteristic of the transistor pair to null.
摘要:
A programmed value determining circuit is provided in which both the area of the programmable element and the leak current are reduced. During the first period after power is turned on, both the PMOS transistor Qp1 and the NMOS transistor Qn1 are turned off, and the storage node is disconnected from the power line VDD and the ground line VSS. During the second period after the first period, at least the NMOS transistor Qn1 is turned on, the storage node is connected to the ground line VSS via the program element 10, and the state of the storage node is detected by the detecting portion 11. During the third period after the second period, the PMOS transistor Qp1 and the NMOS transistor Qn1 are turned off, and the state of the storage node is held by the latch portion 12.
摘要:
A semiconductor device includes: a transmitting section; and a receiving section, wherein the transmitting section and the receiving section are connected to each other through a bus, the transmitting section includes an encoding section for encoding data including a plurality of bits to produce bit-position information which indicates a position of at least one bit selected from the plurality of bits included in the data, and an output section for outputting the bit-position information onto the bus, and the receiving section includes an input section for receiving the bit-position information from the bus, and a decoding section for decoding the bit-position information to produce the data.