55results about "Single pulse train generator" patented technology

A pulse pattern generator (11) has a pulse generating unit (12) and a lowpass filter (14), and the pulse generating unit (12) includes an amplitude-value setting unit (13, 13a). The pulse generating unit (12) generates a pulse signal formed in a step-like wave in which at least one of rise and fall of a signal is changed in a step-like manner. The lowpass filter (14) smoothes the pulse signal generated by the pulse generating unit (11), and outputs a smoothed pulse signal. The amplitude-value setting unit (13, 13a) adjusts an amplitude value of a step-like wave that forms the pulse signal in order to set a shape of an eye waveform based on a setting value when an eye pattern of the output from the lowpass filter (14) is formed. The pulse pattern generator (11) can output the pulse signal having a desired pulse pattern having the predetermined eye closure from the lowpass filter (14).

A digital signal transfer device generates from a modulating section (100) a modulated signal responsive to a digital input signal and transfers this to a demodulating section (200) through a pulse transformer (6). The demodulating section (200) generates from the modulated signal an output signal in which the digital input signal waveform is restored.

A bipolar pulse generator is implemented in a simple structure while providing a high efficiency design having a relatively low total size, while still allowing access by fibers used to control a photoconductive switch that activates the generator. The bipolar pulse generator includes a stacked Blumlein generator structure with an additional transmission line connected to a load at its near end and short-circuited at its distal end. An extra transmission line is positioned between the Blumlein generator's structure and the load provides specified limited gap between positive and negative sub-pulses. The bipolar pulse generator further includes a bended Blumlein generator structure, in which an existing intrinsic “stray” transmission line is used to provide the bipolar pulse. Still further, bipolar pulse generator includes stepped transmission lines, with additional switches positioned between steps, which are charged by different voltages.

Disclosed herein is a functional electrical stimulation (FES) device and system. In one embodiment, sequential bipolar pulse stimulation may be provided to an area of a living body via one or more electrode leads applied to the area via a FES device comprising a current pulse generating circuit comprising output nodes for operative coupling to the one or more electrode leads, and configured for operative coupling to a voltage supply. The current pulse generating circuit generally comprises positive and negative stimulation paths drawing from the voltage supply to respectively apply positive and negative currents through the area via the one or more electrode leads. In one example, the stimulation paths comprise respective capacitive elements, a capacitance ratio of which dictating, at least in part, an amplitude ratio of the positive and negative currents, wherein periodic alternative activation of the stimulation paths provides the sequential bipolar pulse stimulation. In another example, each path comprises a respective charging element and a respective activation switch, wherein each respective charging element is charged by the voltage supply and discharged upon activation of the respective activation switch to generate positive and negative current pulses respectively, such that a pulse rise time of the positive and negative current pulses is predominantly dictated by a switching speed of each respective switch. Systems and uses for these devices, and FES in general, are also described.

The invention provides a method and a device for playing a digital audio which are applied in a digital audio broadcasting receiving terminal with local clocks. The method comprises the steps of counting the number of the local clocks in audio data frames, each audio data frame comprises a plurality of audio data; obtaining the number of the local clocks in the audio data according to the number of the local clocks in the audio data frames; counting the local clocks, generating a playing signal when counting the number of the local clocks in the audio data and outputting the audio data according to the playing signal for playing the audio. The invention enables the digital audio broadcasting receiving terminal to accurately obtain the audio playing frequency, leads the jitter of the audioplaying frequency to be reduced to the minimum and further ensures the playing quality of digital audio broadcasting.

A spread spectrum clock generator includes a phase comparator that compares a reference clock with a feedback clock, a low-pass filter that passes a predetermined low-frequency component, a phase lock loop that includes a voltage-controlled oscillator generating an output clock whose frequency corresponds to the filtered signal, a triangular wave controller that generates a triangular wave signal for frequency-modulating the spread spectrum clock based on the output clock, a delay controller that generates the feedback clock by controlling delay of the output clock based on the triangular wave signal, a first counter that counts the output clock and output a first count value, a second counter that counts the reference clock and output a second count value, and a phase error correction circuit that compares the first count value with the second count value and corrects phase error of the output clock.

A microwave energy source that generates a microwave energy is disclosed. The microwave energy source has an on-state and an off-state. A control circuit is coupled to the microwave energy source and includes an output to generate a control signal that adjusts a pulse frequency of the microwave energy. A voltage generator applies a non-zero voltage to the microwave energy source during the off-state. A frequency and a duty cycle of the non-zero voltage is based on a frequency and a duty cycle of the control signal. A waveguide is coupled to the microwave energy source. The waveguide has a supply gas inlet that receives a supply gas, a reaction zone that generates a plasma, a process inlet that injects a raw material into the reaction zone, and an outlet that outputs a powder based on a mixture of the supply gas and the raw material within the plasma.

A bipolar pulse generator is implemented in a simple structure while providing a high efficiency design having a relatively low total size, while still allowing access by fibers used to control a photoconductive switch that activates the generator. The bipolar pulse generator includes a stacked Blumlein generator structure with an additional transmission line connected to a load at its near end and short-circuited at its distal end. An extra transmission line is positioned between the Blumlein generator's structure and the load provides specified limited gap between positive and negative sub-pulses. The bipolar pulse generator further includes a bended Blumlein generator structure, in which an existing intrinsic “stray” transmission line is used to provide the bipolar pulse. Still further, bipolar pulse generator includes stepped transmission lines, with additional switches positioned between steps, which are charged by different voltages.

The invention discloses a frequency multiplier with high frequency multiplication number of times. The frequency multiplier mainly comprises a buffer circuit, a voltage controlled oscillating circuit connected with the buffer circuit, a microwave circuit, a control circuit connected with the microwave circuit, and a phase locked loop circuit connected with the control circuit. The frequency multiplier is characterized in that a frequency multiplier circuit is also arranged between the voltage controlled oscillating circuit and the microwave circuit, and the frequency multiplier circuit comprises an audion VT1, an audion VT2, a capacitor C7, and a resistor R3, wherein the cathode of the capacitor C7 is connected with the base electrode of the audion VT1, the anode of the capacitor C7 is connected with the voltage controlled oscillating circuit, one end of the resistor R3 is connected with the cathode of the capacitor C7, and the other end of the resistor R3 is connected with a resistor R4 and then is connected with the emitting electrode of the audion VT2. The frequency multiplier is provided with the frequency multiplier circuit which can increase the frequency multiplication number of times of the frequency multiplier, thereby having broad application range.

The invention relates to a non-overlapping clock-generating circuit with independently regulated two-phase pulse duration, belonging to the field of non-overlapping clock-generating circuit. The circuit is characterized in that a time delay unit is provided in front of CLK2 of two-phase non-overlapping clock-generating circuit which can generate advance timing, the input of the time delay unit is connected with clock signals, the output thereof is connected with an input terminal CKL2 of an alternative denial gate; the time delay unit can be used to independently regulate the pulse duration of PH1 and PH2. When parameters satisfy the condition that TD is less than or equal to TD1+TD2, PH1 pulse duration of the clock is T / 2-TD2-TD, PH2 pulse duration of the clock is T / 2-TD2+TD; non-overlapping time between PH1 and PH2 is TD2; clock PH1E falls by TD2 earlier than PH1does, clock PH2E falls by TD2 earlier than PH2 does; when TD1 is equal to TD2, PH1E and PH1 can rise simultaneously, so do PH2E AND PH2. The circuit of the invention has the advantage that pulse duration, non-overlapping time and advance timing rising edge of the two-phase non-overlapping clock can be adjusted.