DE2113546A1 - Output unit for a logical system - Google Patents

Description

Licentia Patent-Verwaltungs-Gmbll Frankfurt / Main, Theodor-Stern-Kai 1

Berghoff / ks. BI 70/97

Output unit for a logical system

The invention relates to a circuit arrangement for outputting an amplified DC voltage signal for a logical alternating voltage system.

Such a system with its various logic elements, UIID, OR, memory, NOT elements, in which AC input signals are linked to form an AC output signal in that the input signals are fed to separate input transformers and rectified in their secondary circuits by switched on rectifier arrangements The rectified input signals form the individual control potentials for a downstream transistor-Spcrrrschi / ingerschi / ing circuit with feedback transformer and the impulse voltage of the blocking oscillator is fed to the output via an amplifier stage connected in dun Gokundärkrüic dcz feedback transformer. .

209841/0910

BI 70/97

The main condition placed on this system is, that the individual linkages, or in the case of a subject, be it by short circuit or interruption of components, always fail to the safe side, i.e. no voltage on the Lead exit. In the event of a fault, the output signal is therefore always independent of the input signals present Are defined. Between inputs and outputs of the individual ·> There is electrical isolation between the links.

The seams between blocks of AC logic and Bausi ^ were critical in terms of fail-safe so far _.nen} the controlled DC voltage signals v / ground "is as an example vervriesen here to the control of contactors, ansteuerungj where, apart from the DC also significantly higher voltage compared to logic modules is required for control.

The connection of @ ± n®s conventional switching amplifier with dormant control on Logilclbensteine of the aforementioned However, Art does not meet the conditions for an error, i.e. at its output a defective 'component regardless of. an input signal a direct voltage arise.

It is therefore an object of the present invention to provide a Circuit arrangement for outputting an amplified equal voltage signal for a logical voltage system specify the error fair conditions of the system Fulfills.

209841/0910

BI 70/97

According to the invention, this object is achieved by a with the output of the logic circuit through a transformer coupled push-pull transformer, their pulse voltage High-voltage transmission via a further downstream transformer and switched on in its secondary circuit Diodes rectified is fed to the output.

The invention is hereinafter based on one in the figure illustrated circuit diagram explained in more detail.

In the figure, the transistor output amplifier stage of a component of the AC voltage logic, which leads to the output A 1, is denoted by 6 and 2Λ. A transistor push-pull circuit consisting of transistors 2 and J is connected to output A 1. The coupling on the input side E takes place via one transformer 1, one input terminal of which is connected on the primary side to + Un and whose center tap on the secondary side is connected to OV. The pulse voltage of the push-pull circuit, which is controlled by an alternating voltage signal applied to output A 1, is decoupled by a further downstream transformer 4- to transform the voltage to a desired voltage value, the center tap of which leads to + Un on the primary side. In the secondary circuit of the transformer '4-, which contains the output A 2, diodes 5 »7 and a capacitor 8 are switched on for rectification and smoothing of the transformed pulse voltage.

In the event of an error, e.g. transistor 2 or 3 defective, the the circuit arrangement according to the invention at output A 2 no DC voltage signal is generated. There is also potential separation between input Ξ and output A 2.

209841/0910

Claims (1)

Licentia Patent-Verwaltungs-GmbH Prankfurt / Main, Theodor-Stern-Kai 1 Berghoff / ks BI 70/97 Claim Circuit arrangement for outputting an amplified DC voltage signal for a logical system in which AC input signals become an AC voltage Output signal are linked by feeding the input signals to separate input transformers and rectified in their secondary circuits by switched-on rectifier arrangements, wherein the rectified input signals the individual control potentials for a downstream 3? ransi3tor Sporrschwingerschaltung with feedback transformer and the pulse voltage of the blocking oscillator via a into the Secondary circuit of the feedback transformer switched-on amplifier stage is fed to the output, ^ characterized by the output of the logic circuit (A 1) coupled by a transformer (1) push-pull transistor circuit (2, 3) ι which Irapulsspannung via a further downstream transformer stepped up (4) and are switched on in the secondary circuit of diodes (5 _t 7) rectified * is fed to the output (A 2). 209641/0310