| Patent application number | Description | Published |
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| 20090212878 | Oven-controlled crystal oscillator - An oven-controlled crystal oscillator includes a circuit board, a crystal unit surface-mounted on the circuit board, and a temperature control circuit that maintains operating temperature of the crystal unit constant. The temperature control circuit includes a heating resistor, a power transistor that supplies power to a heating resistor, and a temperature sensitive resistor that detects temperature of the crystal unit. The heating resistor is formed, as a film resistor, on a surface of the circuit board in an area thereof in which the crystal unit is located. The temperature sensitive resistor is provided on the circuit board as a film resistor. | 08-27-2009 |
| 20100033258 | Secondary vibration damping type crystal oscillator circuit - A secondary vibration damping type crystal oscillator circuit is formed as a Colpitts type, in which a crystal unit is connected between base and collector terminals, a first capacitor is connected between emitter and collector terminals, and a second capacitor is connected between emitter and base terminals of a oscillating transistor. A region between the emitter and collector terminals or between the emitter and base terminals includes a reactance parallel circuit, in which an LC series circuit is connected in parallel to the first or second capacitor. The reactance parallel circuit has resonant characteristics that the reactance parallel circuit is made capacitive at an oscillating frequency in principal vibration mode of the crystal unit as an oscillating frequency, and a resonant frequency of the LC series circuit corresponds to the vibrational frequency in secondary vibration mode that is close to the principal vibration mode. | 02-11-2010 |
| 20100102892 | CRYSTAL OSCILLATOR - A crystal oscillator includes a crystal unit and a voltage-variable capacitive element that is connected to the crystal unit in series, the crystal oscillator varying an oscillation frequency by applying a control voltage between terminals of the voltage-variable capacitive element and by varying a series equivalence capacitance at a side of the oscillator circuit when observed between terminals of the crystal unit. The crystal oscillator further includes a first resistor and a second resistor for dividing the control voltage. At least one of the first resistor and the second resistor is a temperature sensing resistor, the resistance of which changes depending on a temperature, so as to correct frequency temperature characteristics of the oscillation frequency. | 04-29-2010 |
| 20100231309 | CONSTANT-TEMPERATURE TYPE CRYSTAL OSCILLATOR - A constant-temperature type crystal oscillator includes: a surface-mount crystal unit, in which a crystal element is housed in a case main body to hermetically encapsulate the crystal element with a metal cover, and which includes a crystal terminal serving as a mounting terminal that is electrically connected to at least the crystal element on an outer bottom face of the case main body; a thermistor that detects an operational temperature of the surface-mount crystal unit; and a circuit substrate, on which elements forming an oscillator circuit and elements forming a temperature control circuit along with the thermistor are installed. The thermistor includes a first and second terminal electrode and a temperature detecting electrode that is electrically independent of the first and second terminal electrode. The temperature detecting electrode is electrically connected to the crystal terminal of the surface-mount crystal unit through a circuit pattern formed on the circuit substrate. | 09-16-2010 |
| Patent application number | Description | Published |
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| 20090244246 | INKJET PRINTER AND A PAPER TRANSPORTATION METHOD - An inkjet printer prevents the paper from lifting away from the platen when the suction action of the platen is stopped, and thereby prevents paper jams and other printing problems. The printer | 10-01-2009 |
| 20100032466 | LABEL PAPER INDEXING CONTROL METHOD AND LABEL PRINTER - A label paper indexing control method for a label printer, including steps of conveying label paper having labels affixed with a specific gap there between to a continuous liner through a paper transportation path passed a printing position of a print head, detecting a reference position of the label paper at a detection position upstream from the print head, determining the position of a downstream label end of a label on the paper transportation path as a first distance from the detection position based on when the reference position is detected, updating the first distance each time the label paper is conveyed, executing a power shutdown operation that writes the first distance to nonvolatile memory and turns the power off when a power off command instructing turning the power off is asserted, and reading the first distance from nonvolatile memory when the power turns on without the label paper having been replaced. | 02-11-2010 |
| 20100033752 | PRINTER CONTROL METHOD AND A PRINTER - A printer and reprinting control method do not reprint when an error accompanied by no damage to the actual printing area or print image on paper occurs so that consumables are not wasted. The printer | 02-11-2010 |
| 20110182594 | IMAGE FORMING DEVICE WITH MOUNTED REPLACEABLE UNIT, METHOD OF CHECKING OPERATION IN THAT IMAGE FORMING DEVICE, AND STORAGE MEDIUM STORING OPERATION CHECKING PROGRAM DIRECTED TO THAT IMAGE FORMING DEVICE - When a unit containing a fuse is mounted, in response to detection of a potential indicating that the fuse has not been blown by a detection circuit, a current for blowing the fuse is supplied from a blowing circuit to the mounted unit containing the fuse, and operation of the blowing circuit is checked based on potentials detected by the detection circuit before current supply and after current supply, respectively. When a unit containing a non-blown component instead of a fuse is mounted, a current is supplied from the blowing circuit to the mounted unit containing the non-blown component, and operation of the blowing circuit is checked based on potentials detected by the detection circuit before current supply and during current supply, respectively, or potentials detected by the detection circuit before current supply and after current supply, respectively. | 07-28-2011 |
