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:
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 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.
摘要:
An internal power supply circuit, comprising a plurality of charge accumulators, a first power supply terminal, a second power supply terminal, a first switch for connecting the plurality of charge accumulators in parallel to each other in a first state, and a second switch for connecting the plurality of charge accumulators in series with each other in a second state, the charge accumulators connected between the first power supply terminal and the second power supply terminal at either the first state or the second state, and the first state and the second state set repeatedly to raise or lower a voltage between the first power supply terminal and the second power supply terminal.
摘要:
A solid state image pickup device comprises first switching elements (S'.sub.11 to S'.sub.mn) arrayed in horizontal and vertical rows and composed of a plurality of P-channel insulated-gate field-effect transistors, the first switching elements in each vertical row having one terminals connected in common, a photoelectric transducer layer (17) disposed over the horizontal and vertical rows of the first switching elements (S'.sub.11 to S'.sub.mn) and electrically connected to other terminals of the first switching elements (S'.sub.11 to S'.sub.mn), and a plurality of second switching elements (T.sub.1 to T.sub.n) disposed respectively for the vertical rows of the first switching elements (S'.sub.11 to S'.sub.mn) and connected respectively to the one terminals connected in common of the first switching elements in the respective vertical rows, with the arrangement thereof wherein the horizontal rows of the first switching elements (S'.sub.11 to S'.sub.mn) are selectively energizable and the second switching elements (T.sub.1 to T.sub.n) are selectively energizable to deliver signals based on signal charges generated by the photoelectric conversion layer (17) through the first and second switching elements (S'.sub.11 to S'.sub.mn, T.sub.1 to T.sub.n) so as to produce an image pickup signal output.
摘要:
Solid-state image pickup apparatus, such as an MOS imager, has a two-dimensional array of picture element units each formed of a photo sensitive element and a gating element. The picture unit elements discharge a signal charge onto vertical and horizontal transmitting lines in response to vertical and horizontal scanning pulses. Then, a resulting signal current is used to develop an output video signal. In order to give the output video signal a good S/N ratio, a gain-controlled current amplifier is employed. In several embodiments, the gain-controlled amplifier includes first through fourth transistors with the base-emitter junctions of the first and second transistors and of the third and fourth transistors connected in series, with a constant current source coupled to the first transistor, controlled current sources connected to the second and third transistors, and a load device coupled to the fourth transistor. In other embodiments, the gain controlled amplifier is formed of first, second, and third current mirror circuits connected in a balanced-current arrangement. Electrically variable resistances, e.g., MOS transistors, are coupled to the output transistors of the first and second current mirror circuits to control the current gain.
摘要:
Solid-state image pickup apparatus, such as an MOS imager, has a two-dimensional array of picture element units each formed of a photo sensitive element and a gating element, and scanning circuits for supplying horizontal and vertical scanning pulses. The picture unit elements in turn discharge a signal charge onto vertical and horizontal transmitting lines in response to the vertical and horizontal scanning pulses. Then, a resulting signal current is used to develop an output video signal. In order to provide a strong output video signal with a good S/N ratio, a current mirror circuit, formed of an input transistor and an output transistor with first current-carrying electrodes joined together to a voltage reference point and with control electrodes joined together, amplifies the signal current. A second current-carrying electrode of the input transistor receives a constant current from a current source and also receives the signal current. The output transistor has a second current-carrying electrode connected to an output load. Another current source can be connected to the output transistor so that only AC current will flow to the output load. The output load can be a load capacitor associated with a pre-charging transistor, or can be a serial charge transfer device.
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.