SU135289A1 - Electronic dividing device - Google Patents

Description

Electronic dividing devices are known, in which both input and output values are represented as a pulse repetition rate. These devices have the property of closure necessary for the construction of computational schemes.

The proposed electronic dividing device for the values given by the pulse repetition frequency produces the result in the form of a DC electrical voltage, which makes it difficult to use the device for constructing computational circuits. However, the proposed device can find a useful application in automation systems as a sensor as a ratio of physical parameters defined by pulse repetition frequencies, since it has a simpler logical structure than the known dividing devices.

The proposed device contains two triggers, a differentiating circuit, a coincidence circuit and an integrating circuit. The single input of the first trigger and one of the inputs of the coincidence circuit are the device inputs. The second input of the coincidence circuit is connected to the single output of the first trigger. The output of the coincidence circuit is connected to the counting input of the second trigger and, through a differentiating circuit, to the zero input of the first trigger. An integrating circuit is connected to the output of the second trigger to form the output voltage.

The functional diagram of the proposed dividing device is shown in the drawing.

The proposed electronic dividing device consists of two triggers / and 2, a coincidence circuit 3, a differentiating circuit 4 and an integrating circuit 5. Sequences of unipolar impulses with a repetition frequency / I and fz are fed respectively to the single trigger input / and input 6 of the coincidence circuit 3. For normal operation of the device must comply with the conditions. Under the action of the first impulse of the series (i), the trigger / is triggered and through communication 7 opens

coincidence circuit 5. The first impulse of the series / 2 through the open coincidence circuit 3 arrives at the counting input of trigger 2, forcing it to change its initial state. The second impulse of the series / 2 returns the trigger 2 to the initial state, and its output impulse, passing through differentiating circuit 4, returns to the initial state trigger 1, closing the coincidence circuit 3. Thus, the duty cycle of the output voltage of the trigger 2 will be proportional to frequencies / 1 // 2. The output voltage of trigger 2 goes to integrator 5, at input 8 of which the reference voltage UQ is applied. At the output 9 of the device, a DC voltage is obtained, described by the expression

Subject invention

An electronic dividing device for values given by the pulse repetition frequencies with an output in the form of a direct current electric voltage, characterized in that, in order to simplify the logical structure, it contains a differentiating circuit, a coincidence circuit and two Trieggers, the first input of which and one of the inputs of the coincidence circuit are the inputs of the device, and the second input of the coincidence circuit is connected to the single output of the first tripper, the ground input of which is through a differentiating circuit and the count input of the second rule. connected to the output of the coincidence circuit, and an integrating circuit connected to the output of the second trigger serves to form the output voltage.

 and l

Vn

Uebtx