CS213508B1 - Connection for modular junction characteristics - Google Patents

Abstract

The invention belongs to the field of electronics and solves the correction of the module characteristic. It is essentially created by a single differential amplifier and a minimum number of passive elements - resistors and capacitors. It is used in low-frequency circuits as a gain and overdrive filter at the same time, for the correction of module characteristics in transmission equipment. The invention is shown in the attached drawing.

Description

213 SOS

The present invention addresses a new implementation of the correction of the modular characteristic, which is created by a single differential operational amplifier and a miasim counting resistor and capacitor.

The wiring known today for the implementation of the modular characteristic correction is usually designed such that, in particular, the filters can be used for suppressing / absant-filtering / and, in particular, for highlighting / viewing-filtering / modular characteristics at a given frequency. the frequency at which the correction is made, these connections include a considerable number of both active and passive pins.

The above mentioned drawbacks are eliminated by a new connection that utilizes the properties of a simple second order active filter, wherein at least one third resistor and one first potentiometer are connected to one inverted input of the differential operational amplifier, the second terminal of the third resistor being connected to the input ρδΐ and the second outlet of the first potentiometer, the runner of which is connected to one of the outlets, is connected to the output terminal of the differential operational amplifier, which is also the output pole of the corrector connection. Since the input of the differential operational amplifier is not inverted and the input pole of the corrector connection is connected by its outlets at least a second resistor which is bridged by the serial connection of at least two capacitors, the first capacitor is connected by one of its at least one first resistor, which is its second outlet connected to a common zero pole.

Such a method, with a minimum number of resistors and capacitors, and the use of a single differential operational amplifier, can smoothly correct the course of the modular characteristic, i.e., suppressor or highlight? continuously changing the value of the potentiometer. The features of this proposed circuit make it possible to cascade such correctors without any particular problems, and also to change the frequency at which the corrector is working can be done? simultaneously changing the capacitors or resistors (first and second).

In the accompanying drawing, there is shown a circuit for correcting a modulated characteristic according to the invention where a basic connection of an active second-order corrector comprising one differential operational amplifier DOZ is drawn. on the inverting input of which one third resistor R3 and one first potentiometer P1 are connected by one of their outlets. the slider being connected to one of its two terminals, the second terminal of the third resistor R3 being connected to the input ρδΐ X and the second terminal of the first potentiometer H. the output terminal of the differential operating amplifier DOZ. which is also the output ρδ-l of the corrector Y. A second resistor R2 is connected by its terminals through the input ρδΐ of the connection £ and the non-inverting input of the differential operational amplifier DOZ. which is bypassed by serial connection of the first capacitor C1 and the second capacitor C2. wherein, between the first capacitor 01 and the second capacitor C2, the first resistor R1 is the only one terminated by its second terminal connected to a common zero ρδΐ connection.

Can the suggested connection be used? mainly in low frequency circuits such as absent and filter simultaneously, for correction of modular characteristics in transmission equipment and the like ·

Claims (1)

SUBJECT OF TINÍIBZB The modulation characteristic correction circuit is characterized in that it is composed of one differential operational amplifier (DOZ) to which the inverting input is connected by one of its terminals at least one third resistor (RJ) and at least one potentiometer (P1), the other terminal of the third resistor ( RJ) is connected to the input pole (X) and the second terminal of the first potenoiometer (H), the slider of which is connected to any of the terminals of the potenoiometer (Pl), is connected to the output terminal of the differential operational amplifier (DOZ). at least one second resistor (R2) is connected by its outlets (Ϊ) and between the non-inverting input (DOZ) and the input pole of the wiring (X), which is bridged by at least two capacitors (C1) and (C2). (C1) and the second capacitor (C2) has at least one first resistor (R1) connected to one of its terminals, which is they are connected to the common zero pole (0) by a second terminal.