Abstract: In a printhead having an element substrate on which a digital circuit including a printing element and a drive circuit for driving the printing element in accordance with input print data, and an analog circuit including a detection circuit for obtaining information, a voltage generation circuit for generating the voltage for driving the analog circuit when the value of the voltage for driving the digital circuit is different from that of the analog circuit is arranged on the element substrate, and when the voltage for driving the digital circuit is actually different from that of the analog circuit, only the voltage for driving the digital circuit is externally supplied except a power supply voltage for the printing element, thereby simplifying the overall arrangement.

Abstract: With an ink-jet recording head comprising multiple nozzle rows, for discharging ink of different colors, arrayed in approximately a straight line in approximately the same direction as the transporting direction of a recording medium, the positioning spacing of the nozzle rows of each of the colors is set so as to be greater than the length of the nozzle rows for discharging ink of each of the colors. This prevents bleeding on the recording medium and mixing of colors on the recording head in cases of printing at high speeds with in-line type recording heads, in an arrangement with simple modifications.

Abstract: A printing head has a plurality of heater boards, each of which includes a shift register to which printing data and selection data for selecting preheating pulse signals are applied as inputs, a latch circuit for latching the printing data, a selection-data latch circuit for latching the selection data, a selection circuit for selecting any one of a plurality of preheating pulse signals inputted in accordance with the latched selection data, and a plurality of heating resistors driven by the printing data or preheating pulse signals. Correction data, obtained by a head correcting apparatus, for performing printing at an average density by correcting the characteristics of each heater board is stored in a memory of the printing head. A printing apparatus decides the selection data in accordance with the correction data and sets the selection data in the selection-data latch circuit.

Abstract: An ink jet head includes a plurality of liquid flow paths for ejecting the ink; and a plurality of heat generating resistors for the respective liquid flow paths, the heat generating resistor being independently drivable; wherein adjacent ones of the heat generating resistors are spaced by not more than 8 microns.

Abstract: Upon executing printing by latching an input digital image signal temporarily stored in a shift register (502) by a latch circuit (501), and energizing and driving a heater (401) using a power transistor (410) using an nMOSFET on the basis of the latched image signal, a voltage converter (111) boosts a voltage representing the ON state of the latched digital signal, and applies the boosted voltage to the power transistor (410).

Abstract: This invention has as its object to provide a substrate for an ink jet recording head, which is compact and can realize stable recording with high reliability, a recording head using the substrate, a recording apparatus mounting the recording head, and a method of driving the recording head. There are disclosed a substrate for a thermal recording head, having a plurality of heating resistor elements, a plurality of wiring electrodes for supplying driving signals to the heating resistor elements, a function element, electrically connected to the heating resistor elements, for selectively driving the plurality of heating resistor elements, and a measurement resistor element which is electrically independent form the heating resistor elements and the function element, and haws a resistance value larger than that of each heating resistor element, an ink jet head, a head cartridge, and a recording apparatus utilizing the substrate, and a method of driving a recording head using a measurement resistor.

Abstract: The present invention is directed to resolve the noise problem with the ink in an ink jet head without changing the substrate manufacturing process for the ink jet head, that is, increasing the cost on the manufacture, and without needs of disposing a noise countermeasure component on the side of the printer main device, or making the design change for the countermeasure. The present invention is characterized in that to prevent malfunction from arising by the noise, a hysteresis circuit to provide different input data threshold values upon rising and falling is provided on an input portion of the signal for a drive control logic system such as a drive input signal for a shift register and a latch circuit on the same substrate as that of the heating elements, the driver and the drive control logic circuit, utilizing a diffusion layer constituting a driver.

Abstract: In a print head of this invention, electricity-to-heat converters and a driver circuit for driving these electricity-to-heat converters in accordance with print data are formed on a single board. The board further includes an input/output interface circuit for receiving print data from an external apparatus, a CPU for controlling a printer apparatus, a ROM, a RAM, an A/D converter, a D/A converter, a timer, and the like, and also includes an external element driver for driving a mechanism portion of the printer apparatus.

Abstract: In a print head of this invention, electricity-to-heat converters and a driver circuit for driving these electricity-to-heat converters in accordance with print data are formed on a single board. The board further includes an input/output interface circuit for receiving print data from an external apparatus, a CPU for controlling a printer apparatus, a ROM, a RAM, an A/D converter, a D/A converter, a timer, and the like, and also includes an external element driver for driving a mechanism portion of the printer apparatus.

Abstract: The present invention relates to a feed-forward amplifying device suitable for radio communication systems such as digital automobile telephone.

Abstract: A printing head has a plurality of heater boards, each of which includes a shift register to which printing data and selection data for selecting preheating pulse signals are applied as inputs, a latch circuit for latching the printing data, a selection-data latch circuit for latching the selection data, a selection circuit for selecting any one of a plurality of preheating pulse signals inputted in accordance with the latched selection data, and a plurality of heating resistors driven by the printing data or preheating pulse signals. Correction data, obtained by a head correcting apparatus, for performing printing at an average density by correcting the characteristics of each heater board is stored in a memory of the printing head. A printing apparatus decides the selection data in accordance with the correction data and sets the selection data in the selection-data latch circuit.

Abstract: Heating elements and logic circuits are provided on the base board of a printing head, and noise inhibiting circuit having a hysteresis characteristic are provided between the logic circuits and the input terminals of the base board. The base board, heating elements, logic circuits and noise inhibiting circuits are fabricated by a semiconductor manufacturing process. Each noise inhibiting circuit applies an input signal that enters from an input pad to first and second gates constituted by two MOSFETs having threshold potentials that differ from each other. A flip-flop circuit set or rest by the outputs of the first and second gates is provided on the output side. The noise inhibiting circuit having the hysteresis characteristic is constructed between the threshold potential of the first gate and the threshold potential of the second gate.

Abstract: This invention has as its object to provide a substrate for an ink jet recording head, which is compact and can realize stable recording with high reliability, a recording head using the substrate, a recording apparatus mounting the recording head, and a method of driving the recording head.There are disclosed a substrate for a thermal recording head, having a plurality of heating resistor elements, a plurality of wiring electrodes for supplying driving signals to the heating resistor elements, a function element, electrically connected to the heating resistor elements, for selectively driving the plurality of heating resistor elements, and a measurement resistor element which is electrically independent from the heating resistor elements and the function element, and has a resistance value larger than that of each heating resistor element, an ink jet head, a head cartridge, and a recording apparatus utilizing the substrate, and a method of driving a recording head using a measurement resistor.

Abstract: There is provided a closing control device for a fallboard of a piano. A fallboard support is detachably mounted on a body of the piano, and the fallboard is rotatably attached to the fallboard support. A linkage has one end thereof connected to the fallboard. A slow closing device is fixed to the fallboard support, and has the other end of the linkage connected thereto, for braking the fallboard by way of the linkage when the fallboard rotates in a closing direction.

Abstract: An ink jet head includes a plurality of liquid flow paths for ejecting the ink; and a plurality of heat generating resistors for the respective liquid flow paths, the heat generating resistor being independently drivable; wherein adjacent ones of the heat generating resistors are spaced by not more than 8 microns.

Abstract: A downsized, low-cost, high-density printhead, a printing apparatus and a printing method using the printhead can be achieved. If the number of electrothermal transducers is N, a shift register is capable of storing print information corresponding to N/8 electrothermal transducers. First, print information corresponding to the capacity of the shift register is transferred to the printhead. Then, the shifting function of the shift register is stopped to hold the print information. A 3-bit selection signal is inputted from an input terminal as the print information information. The selection signal is sent to a time-divisional logical circuit, then N/8 electrothermal transducers are selected, and a printing operation based on the input data is performed. This operation is repeated eight times, to complete printing by all the N electrothermal transducers.

Abstract: An ink jet head includes a plurality of liquid flow paths for ejecting the ink; and a plurality of heat generating resistors for the respective liquid flow paths, the heat generating resistor being independently drivable; wherein adjacent ones of the heat generating resistors are spaced by not more than 8 microns.

Abstract: A system and a method are presented which reduce the number of times of connection and disconnection of calibration standards in a circuit network measurement device provided with many measurement ports. The circuit network measurement device generally includes a network analyzer and a test set. A calibration port is provided and typically placed in the test set. The calibration port consists of a connector and three standards (open, short, and load impedances) connected to the connector internally by means of a selection switch. The measurement port of the circuit network measurement device is calibrated by using the three external impedance standards. The calibrator is calibrated by connecting the measurement port calibrated at the former step. Other measurement ports are then connected to the calibrator to be calibrated.

Abstract: A signal processing circuit comprises a structure wherein emitters of a plurality of transistors are commonly connected, an inverting amplifier is connected to a base of each of the plurality of transistors, and an absolute value of an input signal supplied to the inverting amplifier is detected. The signal processing circuit has a compensating circuit to compensate a fluctuation of a voltage due to the plurality of transistors.

Abstract: A recording head comprises a liquid emission member having an orifice through which an ink is emitted, an electro-thermal converter element for generating a thermal energy which is utilized to emit the ink introduced into the liquid emission member, and a functional element disposed on a same substrate on which the electro-thermal converter element is disposed for driving and controlling the electro-thermal converter element.The functional element includes an NPN bipolar transistor for driving the electrothermal converter element and a CMOS transistor composed of an NMOS transistor and a PMOS transisfor for controlling an operation of the bipolar transistor.The NMOS transistor being formed in a P well diffusion layer in an N.sup.- type epitaxial growth layer which is grown on a surface of a P type semiconductor substrate.The PMOS transistor being formed in an N well diffusion layer in the N.sup.- type epitaxial growth layer which is grown on the surface of the P type semiconductor substrate.