U.S. Philips Corporation

Wilhelm Graffenberger

Eise Carel Dijkmans

Ernst A Kilian

Rudy J Van De Plassche

Paul Sonnenberger

Adriaan Cense

Udo F Schillhof

Gerd Onken

Petrus A Van Westen

A circuit arrangement having at least two signal paths which can be alternately enabled by feeding respective controllable current sources and by logic signals selecting one of these controllable current sources, while, at a transition from one signal path to the other, the controllable current sources of the relevant two signal paths are controllable by a time-continuously changing control signal during a transition interval, such that currents which can be supplied by these two controllable current sources change continuously and in opposite directions. The object of implementing this circuit arrangement in such a way that the number of components is noticeably reduced in a device enabling a gradual transition from one setting position to the next is achieved with a selection circuit (1) having a control stage (11; 21; 31; 41; 51) for each signal path (T18,T19; T28,T29; T38,T39; T48,T49; T58,T59), each control stage (11; 21; 31; 41; 51) including:

Circuit arrangement having at least two signal paths

The invention relates to a circuit arrangement having several signal paths which can be activated by a switchable current source. For the current source, use is made of I.sup.2 L gates whose injector connections are combined in two groups. When a switch-over is made from one signal path to another, a decreasing current is applied to the injector connection of the I.sup.2 L gate connected to one signal path while an increasing current is applied to the corresponding connection of the I.sup.2 L gate associated with the other signal path.

I.sup.2 L gate circuit arrangement having a switchable current source

A low-noise bass-control device, which is digitally controllable in a simple manner, comprises an amplifier having an output connected to the series arrangement of a capacitor and a tapped resistor chain. The taps on said resistor chain are connected to an inverting input of the amplifier via a first switch and to the output of the control device via a second switch.

Circuit arrangement with electronically controllable transfer

A circuit for transmitting in opposite directions two pulse-shaped signals via one connecting terminal(K) of a semiconductor body. When one signal is transmitted the signal path for the other signal is inhibited, which is accomplished by means of switching means (1, 2, 3, 4). A possible use of said circuit is one in which, via the same connecting terminal, a synchronizing signal for synchronizing the field deflection in a television receiver is first applied to the semiconductor body and a blanking pulse is produced from said body thereafter.

Circuit arrangement for transmitting two signals over one line in

A push-pull B-stage in IC is arranged with an additional transistor in such a manner that one transistor in the IC and the additional transistor together constitute a new push-pull amplifier while the transistor in the IC is loaded to a higher extent and the other final stage transistor in the IC only serves as a driver for the additional transistor.

Growing community of inventors

Hamburg, Germany

Wilhelm Graffenberger