SU581579A1 - Pulse shaper for measuring the frequency of a periodic signal - Google Patents

Description

Tep in steady state (a - shaper output signal); in fig. 3 - the same in transient mode.

Forms contains an upper level latch 1, a threshold device 2 with an upper threshold, an integrator 3, a bistable element 4, a clamp S at a lower level, a threshold 6 device with a lower threshold, key 7, integrate 8, block 0 zero and latch 10 lower level.

Shaper works with the following oiSpevom.

When the output signal of the integrator 3 (see Fig. 2b) reaches the upper threshold, the response (PRT) is triggered by the PS of each device 2 and sets the bi-swivel element 4 (“Fig. 2c”) to state I, and when the upper fixation level is reached (VUV ) The output signal of the integrator 3 does not change until the moment of the European polarity of the two signal. Now the output (the signal of the integrator 3 is changed and the sequence reaches the lower response (NPS) of the threshold device, when the bistable transition switches to the 0% state and the lower fixation level (NFR) determined by the fixators 5 npwioptwoftanett is less negative than BTIG and NUF, and proportional to the area of positive half-wave is proportional to the difference between OPS and FU (see Fig. 2 - square fits for both half-waves are equal in absolute value).

The total increment of the output signal of the integrator 8 (see Fig. 2d) over the time, smokes and bistable element 4 was in state 1 and the key 7 was opened, equal to zero, repeated by the PRT and VUV, controlled by the output signal of the integrator 8, do not change (see Fig. 2c).

In the absence of a signal at the input: block 9, the mixing of the sets sets the output signal of the integrator 8 at a level (determined by clamp 10). In this case, the PRT is set at the level g (Fig. 3B) and the area thresholds are set to the minimum possible.

The transition process to establish a regular UPU and its associated re. Guided VUV - from the minimum value of scientific research institutes, determined by the lock knob, to the values at which the response thresholds by area equal to 5% of the half-wave area (see Fig. 3).

Claims (1)

Invention Formula F (world (pulse holder for measuring the frequency of a periodic signal) containing a bistable element, the inputs of which are connected to the outputs of two threshold openings, characterized in that, with the purpose of measurement accuracy in the presence of interference, a key, three clamps, two integrators are entered into it and zero offset zero, the output of which is connected to the first input of the first integrator, the second input of the first integrator is connected to the output of the key, the inputs of which are connected respectively to the output of the bistable element and the first BxoatM of the second integrate pa, the second and third inputs of which are connected to the outputs of the first and second clamps and the input of the first clamp is connected to the first input of the first threshold element and to the output of the first integrator, the third input of which is connected to the output of the third clamp, and the output of the second integrator is connected to the second input of the first threshold element and the input of the second threshold element. Yi ig. 2