Abstract: The invention relates to a method for rapidly and accurately displaying the frequency of statistically occurring events, which method provides a display value after only a short period even in the case of low frequencies. The smoothing required for a high-resolution display when events occur at a low frequency is carried out with relatively little delay. It does not prevent a rapid change to higher display values when the frequency of events rises rapidly. Said method is therefore especially suitable for displaying statistically occurring immission and for traffic monitoring and control.

Abstract: According to the invention, sensors which require a high voltage supply and require little current at least for temporary periods are supplied by an blocking oscillator with a high degree of efficiency. The efficiency of said blocking oscillator is due to the low inverse current of the rectifier, the blockage recovery time being short at the same time, the low consumption of the controlling system, and economical and therefore inexpensive voltage measurement. In particular, batteries with an especially long life can be used.

Abstract: At a transmission line (La', Lb') connected with telephone station equipment (Tel) via a lowpass filter (TP), via which telephone station signals are transmitted in a first frequency range, there is connected via a line transformer (U3) a data terminal (DG) which is able to receive and to send data signals in a second frequency range above the first frequency range. On its side toward the transmission line (La', Lb'), the lowpass filter (TP) has a capacitive termination (C7) which is rated so that its a-c resistance is in the order of magnitude of or preferably less than the characteristic impedance of the data transmission line in the second frequency range.

Abstract: A circuit arrangement for transmitting synchronously and asynchronously occurring data is described. The synchronous data are transmitted using a plesiochronous, synchronous data transmission system. Additionally, at the send side, a submultiplexer receives asynchronous data and transmits that data synchronously with the send-side clock signal to the send-side multiplexer. The aforementioned transmitted data are received at a receive-side multiplexer and coupled to a receive-side submultiplexer for transmission to receive-side subscribers. Both submultiplexers operate in accordance with identical clock signals.

Abstract: A method for transmitting data according to time division multiplex principles is described. In each multiplex frame synchronizing bits and data bits are transmitted from a multiplexer at the transmitter over a transmission device to a multiplexer at the receiver. In each time division multiplex frame a constant number of data bits are transmitted. The synchronism of the transmitter and receiver multiplexing devices and the transmission devices located at the transmitter and receiver are established by altering the duration of the time division multiplex frame.

Abstract: A circuit for receiving low transmission voltage, direct current data signals is described. The circuit operates to form the received signal into two voltages which are symmetrical with respect to ground, and the latter two voltages are coupled to the inputs of a difference amplifier. The amplifier comprises two, oppositely-phased outputs which are coupled to different ones of the inputs. An amplified differential signal is produced at a third output terminal.