Abstract: Electric resistor, including at least two simultaneously produced monolithically combined MIS field-effect transistors for integrated circuits, each of the transistors having a source electrode and a drain electrode defining a source-drain path, a gate terminal and a channel width to channel length ratio, the transistors being connected in series with each other through the source-drain paths, each respective transistor having the gate terminal thereof connected to one of the source and drain electrodes thereof, and the transistors differ with respect to the channel width to channel length ratios thereof.

Abstract: A digital semiconductor circuit for an electronic organ has a plurality of control inputs addressed via a keyboard and corresponding in number to the number of keys of the organ keyboard, and a plurality of audiofrequency signal inputs addressed with periodic electrical oscillations by an oscillator system. Each control input is associated with a respective key of the keyboard and each audiofrequency signal input is permanently assigned with a respective tone frequency of the highest octave of the organ. The control signals serve to address the control inputs by the keys of the keyboard corresponding to logical levels "1" and "0." The circuit further includes a number t of divider stages in a frequency divider at least equal to a number q of the octaves in the organ keyboard. A number u of a plurality of AND gates in a given group of AND gates is greater than the number q of the octaves in the organ keyboard.

Abstract: Digital semiconductor circuit having a plurality of control inputs addressed via a keyboard corresponding to the number of keys on an organ keyboard, as well as having a plurality of audio signal inputs addressable by an oscillator arrangement with periodic electrical oscillations, each control input being permanently assigned to a key of the keyboard and each audio signal input of an audio frequency, and further having respective audio frequency outputs provided for driving an electroacoustical transducer, the control inputs being addressable by control signals corresponding to the logic levels, including a clock-controlled shift register operated as a parallel-to-series converter and having respective cells to which the respective control inputs are assigned, the shift register having a signal output, a switching system controllable by the signal output of the shift register and by clock pulses provided for the operation of the shift register, the switching system having the totality of the audio signal inp

Abstract: Monolithically integrated digital semiconductor circuit formed on a semiconductor body and having MIS field-effect transistors and an electric terminal as signal input in the semiconductor body, including respective devices for applying two operating potentials to the digital semiconductor circuit, a manually actuatable sensor switch connecting the respective devices to the electric terminal for applying one of the operating potentials thereto, one of the MIS field-effect transistors having a source drain path and a control gate, the transistor being rendered conductive by an electric pulse applied to the gate thereof and the electric terminal being connected in the semiconductor body to the means for applying the other of the operating potentials thereto through the source-drain path of the transistor, an additional circuit component forming part of the digital semiconductor circuit and representing an AND function, the additional circuit component having at least one terminal connected to the electric termi