摘要:
A variable delay circuit includes a load on a signal transfer line, at least one transistor connected to the signal transfer line. Each transistor is controlled by a gate voltage thereof so that a signal on the signal transfer line is delayed in response to a magnitude of the gate capacitance connected thereto.
摘要:
A focus detecting system is provided with a non-destructive type photoelectric conversion element array, an A/D converter for converting the analog output of the photoelectric conversion element array into a corresponding digital value, and a focus-detecting arithmetic circuit for performing arithmetic operations upon the distance to an object on the basis of the digital value output from the A/D converter. In the focus detecting system, when a predetermined initial integration period elapses after the storage of the electric charge has been started, a sequence of in-focus-state detecting operations comprising the steps of effecting non-destructive readout of the output of the photoelectric conversion element array, performing A/D conversion of the readout output and performing arithmetic operations for focus detection is repeatedly executed so that focus detection is effected. With this arrangement, the integration period required for a focus detecting operation can be rationally made as short as possible in accordance with the states of an object, such as brightness and contrast.
摘要:
A spark ignition timing control system for an automotive vehicle internal combustion engine utilizes a first sensor for detecting engine speed, a second sensor for detecting engine knocking and a third sensor for detecting transmission upshifting. The control system operates in response to the first, second and third signals to retard the spark advance angle to reduce knocking due to change in engine speed upon engine upshift.
摘要:
A fuel supply system for an injection-type internal combustion engine using a gasoline or alcohol blended gasoline as a fuel. In addition to a conventional fuel supply system there is provided a fuel temperature detector which detects and signals the fuel temperature increases and exceeds a predetermined value and a fuel pressure regulating means responsive to the fuel temperature detector for raising the fuel pressure within the fuel supply line applied to each fuel injector above a constant value regulated according to the pressure difference between the fuel pressure within the fuel supply line and the intake manifold vacuum pressure so as to prevent the fuel supply line from being clogged due to the occurrence of vapor lock at the time when the engine is started at a high fuel temperature or when the engine runs at a low speed under a high fuel temperature.
摘要:
A semiconductor memory device includes a plurality of N external ports, each of which receives commands, and an internal circuit which performs at least N access operations during a minimum interval of the commands that are input into one of the external ports.
摘要:
In a semiconductor apparatus of the present invention, a plurality of circuit components are provided. A first bus interconnects the circuit components. A second bus interconnects the circuit components. A switching unit outputs a select signal that causes each circuit component to select one of the first bus and the second bus when transmitting a signal from one of the circuit components to another. The second bus has a size larger than a size of the first bus.
摘要:
An object of the invention is to improve a defect caused at the time of starting a midpoint potential generating circuit for use in a semiconductor device. A bias generating circuit supplies a grounding potential as a bias voltage Vbias and sets a midpoint potential of capacitors C1 and C2 to a grounding potential when a supply voltage VDD is lower than a first reference voltage. When the supply voltage VDD is equal to or higher than the first reference voltage, the bias generating circuit supplies the supply voltage VDD as the bias voltage Vbias. When the bias voltage Vbias is equal to or higher than a second reference voltage, the bias generating circuit supplies a voltage obtained by dividing the supply voltage VPP of the booster power supply circuit as the bias voltage Vbias to a node of the capacitors C1 and C2.
摘要:
An external terminal receives an external signal so as to access the first and second memory chips. The test starting terminal receives a test starting signal activated when the first or second memory chip is tested and inactivated when the first and second memory chips are normally operated. The access signal generator converts the external signal to a memory access signal of the first memory chip. The first selector selects the external signal, which is a test signal, during activation of the test starting signal, selects the memory access signal during the inactivation of the test starting signal. That is, during the test modes, the first memory chip can be directly accessed from the exterior. For this reason, the test program for testing the first memory chip alone can be diverted as the test program following an assembly of the semiconductor device.
摘要:
In a semiconductor apparatus of the present invention, a plurality of circuit components are provided. A first bus interconnects the circuit components. A second bus interconnects the circuit components. A switching unit outputs a select signal that causes each circuit component to select one of the first bus and the second bus when transmitting a signal from one of the circuit components to another. The second bus has a size larger than a size of the first bus.
摘要:
A semiconductor integrated circuit device has a boosted-voltage power-supply circuit generating a boosted voltage, an internal circuit being driven with the boosted voltage, and a control circuit controlling the internal circuit by receiving the boosted voltage. The boosted-voltage power-supply circuit has a first output terminal for the internal circuit, and a second output terminal for the control circuit. The boosted voltage output from the second terminal has a specified level regardless of variation in the boosted voltage being output from the first terminal.