摘要:
An oscillator circuit adapted for a piezoelectric oscillator which has a weak oscillation output for generating high frequencies is provided. The speed of operation of the oscillator circuit is increased. An integrated circuit for such an oscillator circuit is also provided. The oscillator circuit has an amplifier portion consisting of CMOS inverters connected in cascade. MOS transistors forming the CMOS inverters have channel widths that decrease successively from the first stage to the last stage to improve the amplification factor of the amplifier portion at high frequencies. This makes it possible to amplify weak oscillation output from the quartz oscillator (XL). A filter circuit produces a peak of negative resistance at a frequency higher than conventional. This permit oscillation operation at higher frequencies.
摘要:
To provide a voltage controlled oscillator having a large variable width of oscillation frequency while ensuring oscillation starting performance, a P-channel MOS transistor Tr is made ON by detecting that an oscillation signal is provided with a predetermined amplitude value and oscillating operation is shifted from an initial state to a steady state by a detecting circuit OPC and a capacitor CA is connected in series with a series circuit constituted by a crystal resonator XL and a varicap diode CV. In the initial state, a load capacitance is reduced to thereby cancel an amount of reducing conductance gm of an oscillation amplifying portion to correspond to operation of the crystal resonator by a low amplitude and negative resistance necessary for maintaining excellent oscillation starting performance is provided and in the steady state, a width of changing the oscillation frequency is enlarged by enhancing an effect of the varicap diode CV.
摘要:
An oscillation control circuit is offered which can improve the startability of an oscillator circuit operating at high frequencies and at a low power-supply voltage. When the oscillation potential of the oscillation signal is between the inversion potential (1.2 volts) of a CMOS inverter IV1 and the inversion potential (1.8 volts) of a CMOS inverter IV2, the logical output value of a CMOS Schmitt inverter SI1 is 1. The output of a CMOS inverter formed by MOS transistors T32 and T33 is shorted out via a MOS transistor T34. Its logical output value is kept at 1. When the inversion potential of the CMOS inverter IV1 or the inversion potential of the CMOS inverter IV2 is exceeded, if the input voltage to the CMOS Schmitt trigger SI1 increases above its inversion potential (1.8 volts), the logical output value assumes a value of 0. The CMOS inverter formed by the MOS transistors T12 and T13 is first set into operation. The oscillation signal is inverted, setting a circuit LA at a later stage into operation.
摘要:
A granular fixed molded article of an enzyme or microorganism strain is prepared by adding dropwise a liquid composition, composed of (a) a hydrophilic photocurable resin having at least two ethylenically unsaturated bonds per molecule, (b) a photopolymerization initiator, (c) a water-soluble high-molecular-weight polysaccharide having the ability to become a gel upon contact with at least one polyvalent metal ion and (d) an enzyme or microorganism strain, to an aqueous medium containing a polyvalent metal ion to gel the composition in a granular form, and then irradiating actinic light on the resulting granular gel to cure the photocurable resin in the granular gel.
摘要:
Thermal recording materials comprising a thermal recording layer provided on a base, which do not deteriorate with the passage of time due to moisture or oxygen in the air, are disclosed, wherein a stabilizing film composed of at least one metal selected from the group consisting of In, Al, Ag, Au, Rh, Pd, Ir and Pt is provided on at least one face of the recording layer and the film has a thickness of 20 to 100 .ANG..
摘要:
A step tablet in which density steps of a definite shape, each density step having a specific optical density, form a series of decreasing or increasing densities, in which any two density steps contiguous to each other are disposed with a boundary space of a specific shape between the density steps.
摘要:
In a method for recording information by irradiating an optical information recording material comprising a heat mode recording layer comprising a metal on a base with a light beam, the method for recording optical information in which said heat mode recording layer consists of a metal and at least one metal compound selected from metal oxides and metal sulfides and the proportion of the amount of the metal to that of said metal compound increases or decreases in the direction of the thickness of the layer, said recording layer having a layer comprising of mixture of at least one of the metal and at least one of the metal compound, in which irradiation with the light beam is conducted from the side where the proportion of the metal in the recording layer is smaller, and in which melting and removing are conducted until the difference in reflectance of the light between the non-recorded area and the recorded area reaches an extent which permits reading by light. The method permits highly sensitive recording by a light beam of a lower energy and can afford a record of information suitable for reflex reading.
摘要:
A light information recording medium is disclosed. The medium is comprised of a support which has transparency with respect to light. The support has coated thereon a light sensitive recording layer which contains SiO.sub.2 and In at the SiO.sub.2 content of 10 to 35 vol. % based on the total volume of SiO.sub.2 and In. The recording medium can be used for the recording and reading of the information recorded thereon by striking the medium with laser light from the support side. The recording medium can be used as an optical disk memory having excellent recording sensitivity with respect to laser light, long preservability and high resolving power as well and high S/N ratio.
摘要:
An optical information recording medium is disclosed.The medium is comprised of a plastic substrate made of acrylic resin, an undercoating comprised at least one of polyvinyl pyrrolidone and polyvinyl formal on the substrate, and a heat mode recording layer comprised of metal on the undercoating. The recording medium has improved adhesion between the recording layer and the substrate without decreasing the sensitivity of the recording layer.
摘要:
A CMOS circuit prevents feedthrough current and has a small-scaled circuit constitution. An output stage has a P-channel MOS transistor and an N-channel MOS transistor with drains connected to each other to form an output terminal and gates respectively connected to output terminals of first and second series circuits. The first and second series circuits control supply of power and each includes an N-channel MOS transistor and a P-channel MOS transistor with drains connected together to form the output terminal and gates connected together to form an input terminal. A delay circuit receives an input signal and produces a delayed input signal which drives the input terminals of the first and second series circuits. P-channel and N-channel MOS transistors control power potentials applied to sources of the respective P-channel and N-channel MOS transistors of the second and first series circuits and are driven by the input signal which is applied to their gates. The P-channel and N-channel MOS transistors are thereby controlled such that current feedthrough is prevented.