摘要:
The invention is a circuit for generating a sampling pulse raster which has a pulse repetition frequency proportional to periodic events with variable period, which are to be sampled. The sampling pulses can be taken off at the counting stages of a pulse counter the counting input of which is connected to the output of a voltage-frequency converter. The voltage-frequency converter has two inputs: one for a voltage proportional to the period of the periodic events; another for a voltage proportional to the selected number of sampling pulses per period. The first voltage controls the frequency of the output pulses of the voltage-frequency converter in an inversely proportional sense.
摘要:
A phase shifting circuit having a first delay element with a time constant .tau..sub.1, a second delay element with a time constant .tau..sub.2 smaller than .tau..sub.1 and a pulse generating element such as p-n-p-n transistor produces phase shifting pulses with respect to a reference phase upon application of a step-up voltage to the first delay element and periodic pulses to the second delay element. The two signals rise at different rate following respective curves and the two curves intersect at various points. The pulses generating element compares the two signals and produces a pulse at the instant the two signals coincides at the intersecting points. The phase shifting pulses have a linear phase relation with respect to the reference phase which is equal to the phase of the periodic pulses applied to the second delay element.
摘要:
Very narrow pulses of high-frequency sine wave electromagnetic energy are formed by use of a gated or pulse modulated continuous-wave source feeding a transmission line network having a time-limited impulse response and adjusted to provide a series resonance with the leakage capacity of the source gating or modulating switch for the purpose of assuring that a maximum of the available energy is employed to form the output and that the output level is nulled before and after the generation of the high-frequency pulse.
摘要:
A clock pulse generator for word pulses is comprised of a signal generator, a distributor to divide the signal generated by the signal generator into a plurality of outputs, a plurality of parallel circuits connected to receive the divided signals, each circuit including a serially connected delay circuit and a pulser, and a mixer to combine outputs from the parallel circuits characterized in that the respective parallel circuits have equal delay time difference.
摘要:
A charge storage means, such as a capacitor, and a switch, such as the emitter-to-base diode of a unijunction transistor connected across the capacitor. To prevent the capacitor from discharging prematurely, a valve, such as a second capacitor, is placed in series therewith in the charging circuit thereof. The values of the capacitors can be so chosen that once the first one discharges into the emitter-to-base diode circuit, it cannot again charge to the firing potential of this unijunction transistor until the second capacitor independently is discharged.
摘要:
In a data processing system, apparatus for synchronizing a slave clock in an input/output device with a master clock in a central processing unit. A set of clock signals from a CPU are received in parallel, converted to serial and pulses are generated in response to the leading and trailing edge of each of the series of signals. The series of pulses is then delayed and shaped to drive a slaved I/O clock. A delay line is adjusted so that the total equivalent system delay is equal to an integral number of CPU pulse durations.
摘要:
A delay line and logic control gated micrologic circuit clock signal pulse train generator with each pulse waveform clock signal in synchronism with its initiating gate trigger signal. A NAND gate receives an activating gate trigger signal and immediately a voltage shift in NAND gate output with this is then passed through a delay line coil both to output path means and also back as an additional input inhibit for the NAND gate at a predetermined delay determined by the delay line. The immediately resulting voltage shift at the NAND gate output is again passed through the delay line coil with the same delay to then remove the inhibit signal from the NAND gate with again an immediate shift in the NAND gate output voltage, and with the pulse generating cycle continually repeating itself with precise pulse width and spacing between pulses in a pulse train in synchronism although delayed from the start of the activating gate trigger signal with the pulse train cycle generating action continued just so long as the activating gate trigger signal is applied.