Abstract:
PROBLEM TO BE SOLVED: To provide a boosting type level shifting circuit with the improved hot carrier robustness. SOLUTION: A series circuit of resistance elements R106_a and R106_b is arranged between each of the drains of a transistor Q101 at an input stage and a transistor Q103 at an output stage. The series circuit is also used as a feedback signal acquiring portion 105. A signal acquired by a connection node N106 of one of resistance elements R106_a and R106_b is adopted as a feedback signal SFB to the gate of the transistor Q103 of another side at the output stage. When the resistances element R106_a and R106_b are arranged as above, voltage between the drain and the source of the transistor Q101 can be reduced to a small value by utilizing potential difference based on an operating current at the time of switching operation, thereby, the hot carrier robustness can be improved. In addition, since a positive feedback loop from a shallow voltage level of the connection node N106 can be formed, a quick response can be obtained. Since a pinch-off region can be quickly got through, the hot carrier robustness can be improved. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To respond to needs of further increase in capacity, further miniaturization, and further power saving in electronic equipment.SOLUTION: A CSP (Chip Size Package) has an antenna for wireless communication related to signal transmission/reception with an external substrate. The antenna is formed as distribution wires of a re-wiring layer arranged between a silicon layer and a solder bump.
Abstract:
PROBLEM TO BE SOLVED: To improve the linearity of a resistor ladder type DAC circuit by the reduction of uncontrollable factors such as a resistance element, regarding the resistor ladder type DAC circuit. SOLUTION: The resistor ladder circuit comprises: a serial resistor group on a high voltage side for which a plurality of resistors are serially connected between a voltage supply terminal and a voltage take-out terminal and the plurality of resistors are set to a specified ratio; a switch group on the high voltage side respectively connected between the connection points of the respective resistors of the serial resistor group on the high voltage side and the voltage take-out terminal; a serial resistor group on a low voltage side for which the plurality of resistors are serially connected to the voltage take-out terminal and the plurality of resistors are respectively set to the specified ratio; a switch group on the low voltage side respectively connected between the connection points of the respective resistors of the serial resistor group on the low voltage side and a reference potential; and a control circuit for switching the connection points of the respective resistors of the serial resistor groups on the high voltage and low voltage sides by the switch groups on the high voltage and low voltage sides and performing switch control so that a composite resistance value does not overlap. By reducing the number of resistors, the randomness of resistance value dispersion is reduced. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a camera module and a camera which enable movement of an image sensor and also enable large lenses with large-aperture lenses, zooming or the like to be mounted.SOLUTION: An actuator unit comprises: a movable joint part to which one end of an imaging element is secured and which is movable in response to back-and-forth movement; a parallel link mechanism part, one end of which is mounted on the movable joint part while the other end of which is secured, and which holds the imaging element at a target position synchronized with movement of the movable joint part; and a needle, one end of which is joined so as to allow transmission of displacement motion in relation to a joined area between the movable joint part and the one end of the parallel link mechanism part, and which is displaced by a displacement corresponding to a level of applied driving voltage, to cause the imaging element to move back and forth between a first position and a second position in the optical axis direction.
Abstract:
PROBLEM TO BE SOLVED: To reduce interference between two or more drive voltages applied to a load such as a CCD. SOLUTION: A drive circuit has a driving mode for outputting current from a certain reference current through current mirror circuits CM1, CM2 when two or more drive voltages are applied to the load such as a CCD, and the current is slowly switched at a certain optional time constant by time constant circuits 540, 541. Consequently, the transient speed of voltage Vout which is a drive voltage is decreased and the interference between the drive voltages is reduced. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a circuit for driving a capacitive load, a method for driving a capacitive load, and a camera module having the circuit for driving a capacitive load which drive a capacitive load whose capacitance value nonlinearly varies with varying temperature, in an optimum condition matching an environmental temperature condition.SOLUTION: The disclosed circuit for driving a capacitive load which is adapted to drive a capacitive load whose capacitance value nonlinearly changes with temperature, and can calibrate a driving force for driving the capacitive load includes: a temperature range detection section for detecting a temperature range in a usage environment of the capacitive load; and a control section for controlling the frequency of calibrating the driving force for the capacitive load in accordance with the temperature range detected by the temperature range detection section.
Abstract:
PROBLEM TO BE SOLVED: To provide a differential output circuit capable of preventing generation of common-mode noise, and to provide a communication device. SOLUTION: This differential output circuit includes first and second current mirror circuits 11, 12 that provide the gates of slave-side transistors Q12, Q14 with gate voltages of master-side transistors Q11, Q13 via voltage followers A11, A12 where a slew rate at a rise time is equal to that at a fall time. Thus, when the master-side current is increased or decreased by providing the gates of the slave-side transistors Q12, Q14 with the gate voltages of master-side transistors Q11, Q13 via the voltage followers A11, A12 where the slew rate at a rise time is equal to that at a fall time, an incremental change in slave-side current and a decremental change in slave-side current are made symmetrical with each other. The use of such current mirrors in a differential manner leads to no generation of common-mode noise even in these changes. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To reduce power consumption in a drive device for driving a capacitive element such as a charge coupled device. SOLUTION: A driver circuit is connected so as to configure a triphase LC resonance circuit among three element electrodes. Three nodes Node-A, Node-B, Node-C of the triphase LC resonance circuit are driven by any one of logic level 0, high impedance Z and 1 so that LC resonance circuits constituting the triphase LC resonance circuit resonate while sequentially shifting phases. By driving each of the phases to keep a phase difference of 2π/3, an output logic takes any one of 0, high impedance and 1 and phases and logics are allocated so as not to overlap with each other in any timing at any point of time. COPYRIGHT: (C)2007,JPO&INPIT