摘要:
A voltage controlled delay circuit is formed by m number of gates connected in series, phases of a clock signal and a delay signal are compared by a phase comparator, an up signal or a down signal is output, an integrated signal is generated by an integrator, a voltage signal following this is generated by a buffer and fed back as an operating power source voltage to the voltage controlled delay circuit, and further an internal power source voltage following the voltage signal is generated by a buffer and a pMOS transistor, therefore the internal power source voltage of the required lowest limit can be supplied in response to the frequency of the clock and a reduction of the voltage and conservation of the electric power of the LSI circuit can be achieved.
摘要:
A clock distributing apparatus which can decrease the clock skew and can prevent the swing of a signal on clock transmission lines and can achieve a low power consumption, a lower noise of a power supply, and a high speed operation, wherein converts clock signals adjusted in phase to the same phase as a reference clock by a PLL circuit to current signals by voltage/current converters and sends the current signals to clock transmission lines and converts the current signals transmitted to the clock transmission lines to voltage signals by current/voltage converters and sends the voltage signals to circuit blocks of an integrated circuit.
摘要:
A liquid crystal matrix display device has a plurality of display elements arranged in an X-Y matrix pattern. Vertical transmitting lines are connected to all of the display elements of each column, and horizontal transmitting lines are connected to each of the display elements of each row. Each of the vertical lines is connected through an input switching element to an input circuit to receive a video input signal and a horizontal pulse generator provides sequential pulse signals to control terminals of the input switching elements. In order to improve the resolution without sacrifice of contrast, the vertical transmitting lines are arranged into groups of a predetermined number of such lines, and the input switching elements associated with the lines of each such group have their control electrodes coupled together to a respective output of the horizontal scanning pulse generator. The input circuit includes time-demultiplexing circuitry, for example, formed of sample/hold circuits, to present respective sampled versions of the input signal, staggered with respect to one another, to input electrodes of respective ones of the input switching devices of each of the groups.
摘要:
A method for forming a Field Effect Transistor (FET) within a strain effect semiconductor layer is disclosed, whereby the source and drain of the FET are formed only in the strain effect silicon layer. The FET may be formed as a gate electrode of a p-channel type field effect transistor, and a gate electrode of a n-channel type field effect transistor on the silicon layer which has the strain effect through a gate insulating film. The sources and drains of p- and n-type diffusion layers are then formed in the silicon layer having the strain effect, on both sides of the gate electrode.
摘要:
A crystal oscillator circuit including a quartz vibrator; an inverter circuit connected in parallel to the quartz vibrator and comprised of at least two transistors connected at their output ends to a first power-supply potential or a second power-supply potential lower than the first power-supply potential; a first current mirror circuit, with one current input-output end connected to a connection line with the inverter circuit of the first power-supply potential, the other current input-output end connected to the output end of the oscillator circuit; and either a second current mirror circuit having two current input-output ends, one current input-output end connected to a connection line with the inverter circuit of the second power-supply potential, the other current input-output end connected to the output end of the oscillator circuit, current flowing to one current input-output end, current flowing to the other current input-output end, and the level of the output end of the oscillator circuit being shifted to the level of the second power-supply potential when the output end of the inverter circuit is connected to the second power-supply potential or a circuit for shifting the level of the output end of the inverter circuit to the level of a second power-supply potential in accordance with the level of the input end of the inverter circuit when the output end of the circuit is connected to a second power-supply potential.
摘要:
According to the present invention, in a liquid crystal display apparatus, there are provided second horizontal switching elements M.sub.Bl to M.sub.Bm, which are driven at the advanced phase relative to picture element switching signals .phi..sub.Hl to .phi..sub.Hm, at columns L.sub.l to L.sub.m to which a video signal is supplied, a signal, which is derived through said second horizontal switching elements M.sub.Bl to M.sub.Bm, is fed back through an inverting circuit (14) and the like to an input terminal (1), and there are provided third switching elements M.sub.Rl to M.sub.Rm which are turned on at every predetermined period. According to this apparatus, since a signal derived from a liquid crystal cell C is returned to the same liquid crystal cell C, the displacement of the picture and the like can be avoided, any special scanning and the like are not required and a prior art driving circuit and so on can be used as they are. Further, since the potential of the signal line is reset at every predetermined period, it is possible to prevent the quality of the picture from being deteriorated by a residual charge and the like and the excellent display of a still picture can be carried out over a long time period.
摘要:
A sample-and-hold circuit is provided wherein an input signal is fed via a first gate element to one end of a first capacitor whose other end is alternately grounded, the one end of the first capacitor being connected via a second capacitor to a gate (or base) of a source (or emitter) follower transistor to obtain an output from the source (or emitter) of the transistor which is connected via a second gate element to one end of the first capacitor, while the gate (or base) of the transistor is connected via a third gate element to a DC voltage supply having a predetermined voltage value, and the second and third gate elements are turned on during a first period of the input signal so that a voltage corresponding to the gate-source (or base-emitter) offset voltage of the transistor is stored in the second capacitor, while the first gate element is turned on during a second period of the input signal to produce an output signal equivalent in level to the input signal.
摘要:
A pulse generating circuit comprises a first series connection of a first switching element (3:13) and a second switching element (4), a second series connection of a capacitive element (5) and a third switching element (6) coupled with a connecting point between the first and second switching elements, an amplifying element (7) having input and output terminals connected to both ends of the capacitive element (5), respectively, and a fourth switching element (8) connected to the output end of the amplifying element (7), and is supplied with a first input signal varying in level through the control terminals of the first and third switching elements (3:13, 6) and a second input signal varying in level through the control terminals of the second and fourth switching elements (4, 8), thereby to obtain a pulse having the width corresponding to the time interval from a variation in the level of the first input signal to a variation in the level of the second input signal at the output end of the amplifying element (7).
摘要:
A filter circuit of the type utilizing a charge-transfer device, such as a bucket brigade device, comprises a clocking signal drive circuit for supplying a clocking signal; a clock signal generator at whose output a clocking control signal is provided; a transistor whose base is connected to the output of the clock signal generator; a plurality of successive capacitive storage stages for sequentially holding a charge level representing a time-sampled input signal, each of the capacitive storage stages having a clocking electrode for receiving the clocking signal so that the charge level is transferred from one to another of the capacitive storage stages in succession, and at least one of the capacitive storage stages being formed of first and second parallel-connected capacitive circuit portions, and the first and second capacitive circuit portions having respective clocking electrodes coupled to the clock signal generator and to the emitter of the transistor, respectively; and a current feedback circuit, such as a current mirror circuit, for detecting the current flowing through the collector of the transistor and applying a corresponding current to a capacitive storage stage in advance of that stage which is coupled to the emitter of the transistor.
摘要:
A semiconductor device includes a memory cell including a thyristor element with a gate having a pnpn structure formed in a semiconductor substrate, and a plurality of access transistors formed on the semiconductor substrate and each connected at a first terminal thereof to a storage node at one terminal of the thyristor element such that a potential at the storage node can be transmitted to bit lines different from each other, the gate of the thyristor element and the gates of the plurality of access transistors of the memory cell being connected to word lines different from one another.