Abstract: A voltage-controlled oscillation circuit (15) includes a plurality of independent ring oscillation circuits different in the number of stages; and a selector (22) selectively outputting as a feedback clock signal (FB) an output of one of the ring oscillation circuits, so that any of the outputs of the independent ring oscillation circuits is always outputted as the feedback clock signal, which makes it possible to output the feedback clock signal keeping a proper duty ratio even when the operating speed is high, allowing arbitrary adjustment of the delay time before an input signal (DLLI) is outputted.

Abstract: A voltage-controlled oscillation circuit (15) includes a plurality of independent ring oscillation circuits different in the number of stages; and a selector (22) selectively outputting as a feedback clock signal (FB) an output of one of the ring oscillation circuits, so that any of the outputs of the independent ring oscillation circuits is always outputted as the feedback clock signal, which makes it possible to output the feedback clock signal keeping a proper duty ratio even when the operating speed is high, allowing arbitrary adjustment of the delay time before an input signal (DLLI) is outputted.

Abstract: A voltage-controlled oscillation circuit (15) includes a plurality of independent ring oscillation circuits different in the number of stages; and a selector (22) selectively outputting as a feedback clock signal (FB) an output of one of the ring oscillation circuits, so that any of the outputs of the independent ring oscillation circuits is always outputted as the feedback clock signal, which makes it possible to output the feedback clock signal keeping a proper duty ratio even when the operating speed is high, allowing arbitrary adjustment of the delay time before an input signal (DLLI) is outputted.

Abstract: A voltage-controlled oscillation circuit (15) includes a plurality of independent ring oscillation circuits different in the number of stages; and a selector (22) selectively outputting as a feedback clock signal (FB) an output of one of the ring oscillation circuits, so that any of the outputs of the independent ring oscillation circuits is always outputted as the feedback clock signal, which makes it possible to output the feedback clock signal keeping a proper duty ratio even when the operating speed is high, allowing arbitrary adjustment of the delay time before an input signal (DLLI) is outputted.

Abstract: A master cylinder is provided on the cylinder body with a reservoir-receiving mouth formed near the border of the section of of a large diameter and the section of a small diameter of a stepped bore, a through hole being formed between the bottom surface of the reservoir-receiving mouth and the first pressure chamber, a compensation hole being formed between the bottom surface of the reservoir-receiving mouth and the second pressure chamber, a valve seat fitted in and fixed to the reservoir-receiving mouth and having an internal hole formed therein, a check valve provided within the reservoir-receiving mouth between the bottom surface of the reservoir-receiving mouth and the valve seat with the valve element being pressed against a resilient member fixed to the valve seat by means of a spring, a projecting member protruding into the first pressure chamber through the through hole provided for the valve element coaxially with the valve element so that the valve element is titlted to form a passage between the

Abstract: In a tandem type brake master cylinder having a body formed with coaxial large and small cylinder bores, a first piston member having a large land sliding in the large bore and a first small land sliding in the small bore, a second piston member having second and third small lands sliding in the small bore, a first chamber defined between the large land and the first small land, a second chamber defined between the first and the second small lands, a third chamber defined between the third small land and a closed end of the small bore, a first spring biasing the first and second piston members apart, a second spring biasing the second piston member away from the closed end of the small bore, first and second outlets opening from the second and third chambers respectively, and a means to allow fluid to pass from the first chamber to the second chamber but not back, a means is provided to prevent the first piston member and the second piston member from becoming separated by a distance greater than a certain pr

Abstract: An inertia-controlled valve unit includes a valve seat provided within a valve chamber and a ball disposed within the valve chamber to co-operate with the valve seat and rolling toward the valve seat to cut-off excessive braking pressure applied to rear wheel brake cylinders. The inertia-controlled valve unit comprises a solenoid winding attached to the valve housing, a plunger passing through the solenoid winding into the valve chamber and located behind the ball, the plunger being moved forwardly by energization of the solenoid winding to engage the ball against the valve seat, a normally open switch attached to a portion of a push-rod for connecting the solenoid winding to a source of electricity when closed, and a movable element slidable on the push-rod to be displaced toward the switch by inertia force acting thereon when the brake pedal is rapidly depressed, the movable element closing the switch when engaged with the switch.

Abstract: A speed-deceleration warning system for motor vehicles comprising pressured-oil supply means connected to a master cylinder of a brake mechanism, a hydraulic switch including a first contact moved by the action of pressured-oil, a speed-deceleration switch including a second contact moved by the influence of speed reduction of a vehicle and an electric circuit extending to a warning element through said first and second contacts. Such a device is applied for sending a warning to a driver if speed-deceleration of a vehicle does not reach an expected value although brake means are set on and hydraulic brake pressure rises over a prescribed value.

Abstract: An inertia-controlled valve assembly includes a valve seat provided within a valve chamber and a ball disposed within the valve chamber to co-operate with the valve seat and rolling toward the valve seat on the inclined bottom surface of the chamber of which the inclination is varied in accordance with the rate of deceleration of the vehicle. In the inertia-controlled valve assembly, a movable element is slidably disposed within the valve chamber to subdivide the valve chamber into a first chamber receiving the ball therein and a second chamber in communication with an inlet port and provided thereon with an orifice to permit fluid communication between the first and second chambers, whereby in rapid operation of the master cylinder the movable element is moved toward the valve seat by a pressure difference produced between the first and second chambers due to the orifice so that the ball is forcibly moved toward the valve seat to close the valve.

Abstract: A safety device for an oil hydraulic braking system of a dual-type including separate oil hydraulic systems for the front and rear wheels, the oil hydraulic system being applied with a so-called proportioning element, the safety device being adapted to detect any hydraulic failure which has occurred in any portion of the entire oil hydraulic system and warn the driver of the failure due to a displacement of a single piston member from its normal neutral operating position.