SU1226337A1 - Pulse duration-to-voltage converter - Google Patents

Abstract

The invention can be used in information-measuring technology, as well as in digital and analog devices. The purpose of the invention is to improve the conversion accuracy when converting a sequence of pulses of a linearly varying duration. The device contains a source of standard voltage I, key 2, integrator 3, latch 4, driver 5 and integrator 6. Accuracy improvement is achieved by introducing integrator 6. The description presents voltage formulas at the outputs of integrators 3 and 6. 2 Il. с о ГЧЭ ГО and с 00 Fig.

Description

one

The invention relates to information-measuring technology and can be used to build both digital and analog devices.

The purpose of the invention is to improve the conversion accuracy when converting a sequence of pulses of a linearly varying duration.

FIG. 1 shows a functional diagram of the proposed device; in fig. 2 - timing charts of the device.

The device contains source 1 of model voltage, key 2, first integrator 3, latch 4, driver 5 and second integrator 6, and source 1 of model voltage, key 2, integrator 3, latch 4 and integrator 6 are connected in series. The outputs of the clamp 4 and the integrator 6 are connected to the corresponding inputs of the integrator 3. The device input is connected to the control input of the key 2 and through the driver 5 to the control input of the clamp 4. The output of the integrator 6 is the output of the device.

The device works as follows.

The key 2 is closed under the action of the input signal at intervals of the input pulse sequence.

Thus, at the input of the integrator 3, voltage 0 acts at nh, t nh + Л ttn3; Oh, with nh + U t (n + 1) h.

The result of the integration of the integrator 3 is determined by both the voltage and the output voltages of the fissor 4 and the integrator 6. Let us write successively the voltage at the output of the integrator 3, starting with zero initial conditions

and, p and, 1;

Ub and Ub 1 + Ua 2

and

 jjj

and

 ifi + ifi),

b W and.

n + and n-1

(1 + (2)

263372

where I and J are the feedback loop coefficients from the output of latch 4 and integrator 6 to the input of integrator 3, respectively.

5 The voltage U p is determined by the relation

tn-l) h + Qt p

and u, dt,

U, J

10 (n-l) h

where is R; C-constant integration of integrator 3. When writing expressions for U, it is taken into account that latch 4, under the action of a signal from shaper 5, memorizes the output signal of integrator 3 at the end of each conversion cycle and stores this value for the entire next conversion clock (voltage Up on timing diagrams, Fig. 2).

Device Output Voltage

defined as the result of integrating the voltage Uj by the integrator 6

Uj (nh + t); j U, with

About t t .t h ,,

nh

(five)

where C, is a constant integra

one

vani integrator 6,

Claims (1)

Invention Formula Pulse duration to voltage transducer containing a series-connected source. model voltage, a key, an integrator and a clamp, the output of which is connected to the second input of the integrator, the input of the device is connected to the control input of the key and through the driver to the control input of the clamp, characterized in that formation, the second integrator is entered into it, the input of which is connected to the output of the clamp, and the output is an output of the device and connected to the third input of the first integrator n p n Editor O. Golovach Order 2125/42 Circulation 728. Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d. A / 5 . - - - --------- - - - - - - - - - - - - - - - - - - - --- - - --- - - - Production and printing company, Uzhgorod, st. Project, 4 Compiled by E. Solovyov Tehred L.Oleynik Proofreaders. Maksimishinets