60results about How to "Accurate delay time" patented technology

An injection locking type or MOPA type of laser device capable of always providing stable output energy and wavelength is provided. For this purpose, the laser device includes an oscillator for exciting laser gas by oscillator discharge and oscillating seed laser light with band-narrowed wavelength, an amplifier for amplifying the seed laser light by amplification discharge to emit amplified laser light, a delay circuit for setting at least one of a delay time from light emission of the seed laser light to light emission of the amplified laser light, and a delay time from start of the oscillator discharge to start of the aforementioned amplification discharge, and a delay time compensation circuit for performing compensation of the delay circuit so that the delay time becomes an optimal delay time.

A ring oscillation circuit, which can operate the ring oscillation due to a positive feedback stably and continuously, is provided and it is applied to an accurate measurement of delay time and a measurement of timing accuracy in a jitter of a clock signal or the like with a high accuracy. A ring oscillation circuit comprises a delay circuit and a monostable multivibrator. An output of the delay circuit is connected to an input of the monostable multivibrator, an output of the monostable multivibrator is connected to an input of the delay circuit, and the delay circuit and the monostable multivibrator configure a positive feedback loop. An oscillation starting circuit for starting oscillation upon receipt of an input of a trigger pulse for triggering oscillation is provided on the positive feedback loop, or in the inside of the delay circuit or the monostable multivibrator.

A delay circuit with a delay time being more accurate and a circuit area being reduced is provided. The delay circuit includes a resistance element 3, a capacitor element 4 and a connection wiring 6. The connection wiring 6 includes a first polysilicon layer 13a above a substrate 10, and a first silicide layer 14a which connects the resistance element 3 and the capacitor element 4 and is on the first polysilicon layer 13a. The capacitor element 4 includes a diffusion layer 12b in the surface region of the semiconductor substrate 10, a gate insulating layer 15b on the diffusion layer 12b, a second polysilicon layer 13b on the gate insulating layer 15b, and a second silicide layer 14b on the second polysilicon layer 13b. The resistance element 3 includes a third polysilicon layer 13c above the semiconductor substrate 10. The first, second and third polysilicon layers 13a, 13b and 13c are integrally provided. The first and second silicide layers 14a and 14b are integrally provided.

An injection locking type or MOPA type of laser device capable of always providing stable output energy and wavelength is provided. For this purpose, the laser device includes an oscillator for exciting laser gas by oscillator discharge and oscillating seed laser light with band-narrowed wavelength, an amplifier for amplifying the seed laser light by amplification discharge to emit amplified laser light, a delay circuit for setting at least one of a delay time from light emission of the seed laser light to light emission of the amplified laser light, and a delay time from start of the oscillator discharge to start of the aforementioned amplification discharge, and a delay time compensation circuit for performing compensation of the delay circuit so that the delay time becomes an optimal delay time.

A communication system includes a transmitter having a signal generator for generating a signal for transmitting data, a transmission delay unit for repeatedly delaying the signal from the signal generator for a predetermined delay time within a symbol period and generating corresponding delayed signals, and a selector for selectively providing one of the delayed signals from the transmission delay unit to an antenna; and a receiver having a reception delay unit for receiving the signal from the transmitter and delaying the signal as long as the delay time of the transmission delay unit, and a data judgment block for discriminating data bits of the signal from the transmitter by comparing the signal from the transmitter with the delayed signal from the reception delay unit. According to the communication system, the delay time can be accurately adjusted even if the delay line is shortened, and the data bits of the communication signal can be accurately judged in the receiver side.

The invention relates to a single lithium battery protection chip with accurate delay and dormancy functions. The chip internally comprises a control module and a detection module, wherein the detection module is used for comparing a voltage at the end VDD of a lithium battery with an overcharge detection voltage and an overdischarge detection voltage and comparing a voltage at the end VM with an overcurrent detection voltage, a short-circuit detection voltage and a charge detection voltage to obtain comparison signals; the control module is used for processing the comparison signals, judging the working state of the lithium battery and cutting off a charge or discharge switch to protect the lithium battery according to the actual situation. When the lithium battery just enters an overdischarge state, a difference between the voltage at the end VDD and the voltage at the end VM is detected; when the value of VDD-VM is lower than that of a dormancy detection voltage and an external circuit does not form a short circuit, the control module is used for controlling the chip to enter the dormancy state to reduce the power consumption and prolong the work time; protection measures adopted when the lithium battery enters an abnormal state are kept, and when the state of the lithium battery is restored, the charge or discharge switch is switched on to remove the abnormal state.

A delay-time correction circuit delays an input signal for generating a pre-drive signal to a drive unit generating a drive signal. A transition-change sensor senses a transition change in one of a turn-on operation and turn-off operation. A correction-signal generator generates a correction signal in response to the transition change sensed by the transition-change sensor and to the input signal. A delay output unit generates an output signal corresponding to the pre-drive signal by delaying the input signal using the correction signal. The delay output unit delays the output signal that instructs the other of a turn-on operation and turn-off operation, from the input signal, in accordance with a length of a period for the transition change in the one of a turn-on operation and turn-off operation that is performed immediately before the other of a turn-on operation and turn-off operation.