Abstract: The present disclosure relates to an integrated circuit output driver, e.g. operating in class-D, for driving an audio transducer. The integrated circuit output driver comprises a first half-bridge driver comprising a first PMOS transistor and a first NMOS transistor connected in series between positive and negative supply voltage rails. A first body terminal is connected to a body of the first PMOS transistor for receipt of a first back bias voltage and a second body terminal connected to a body of the first NMOS transistor for receipt of a second back bias voltage. The integrated circuit output driver comprises a bias voltage generator configured to adjust at least one of the first back bias voltage and the second back bias voltage to control on-resistance of the first PMOS transistor and/or the first NMOS transistor. The integrated circuit output driver is well-suited for hearing aids, headsets and other audio devices.

Abstract: An integrated circuit includes a first logic circuit region comprising a first regional clock network for supplying a first regional clock signal to digital logic circuit(s); and a clock gating circuit to derive the first regional clock signal from a clock signal and selectively apply and interrupt the first regional clock signal in accordance with a state select signal. The first logic circuit region comprises a first back bias voltage grid connected to respective bodies of PMOS transistors of the digital logic circuit(s) and a second back bias voltage grid connected to respective bodies of NMOS transistors of the digital logic circuit(s). The integrated circuit further comprises a controllable back bias voltage generator configured to adjust a first back bias voltage of the first back bias voltage grid, and to adjust a back bias voltage of the second back bias voltage grid, in accordance with the state select signal.

Abstract: The present disclosure relates to an integrated circuit output driver, e.g. operating in class-D, for driving an audio transducer. The integrated circuit output driver comprises a first half-bridge driver comprising a first PMOS transistor and a first NMOS transistor connected in series between positive and negative supply voltage rails. A first body terminal is connected to a body of the first PMOS transistor for receipt of a first back bias voltage and a second body terminal connected to a body of the first NMOS transistor for receipt of a second back bias voltage. The integrated circuit output driver comprises a bias voltage generator configured to adjust at least one of the first back bias voltage and the second back bias voltage to control on-resistance of the first PMOS transistor and/or the first NMOS transistor. The integrated circuit output driver is well-suited for hearing aids, headsets and other audio devices.

Abstract: An integrated circuit includes a first logic circuit region comprising a first regional clock network for supplying a first regional clock signal to digital logic circuit(s); and a clock gating circuit to derive the first regional clock signal from a clock signal and selectively apply and interrupt the first regional clock signal in accordance with a state select signal. The first logic circuit region comprises a first back bias voltage grid connected to respective bodies of PMOS transistors of the digital logic circuit(s) and a second back bias voltage grid connected to respective bodies of NMOS transistors of the digital logic circuit(s). The integrated circuit further comprises a controllable back bias voltage generator configured to adjust a first back bias voltage of the first back bias voltage grid, and to adjust a back bias voltage of the second back bias voltage grid, in accordance with the state select signal.

Abstract: A hearing aid having a microphone for conversion of sound into an input audiosignal, a signal processor for processing the input audiosignal, a receiver for conversion of the processed signal into sound, an audio amplifier for supplying current to the receiver in response to the processed signal, a battery for current supply of the signal processor, the audio amplifier, and the receiver, and a current limiter connected in series between the battery and the audio amplifier for analogue limitation of the current supplied by the battery to the audio amplifier in response to the battery output voltage.

Abstract: The invention is a radio transmitter and a method for transforming digital amplitude as well as phase or frequency modulation information into analog signals for controlling analog amplifier circuitry. The method includes providing first and second digital signals representing phase angle; converting the signals into analog signals; mixing the analog signals with oscillator signals to obtain an analog, modulated signal; providing a third digital signal corresponding to amplitude; converting this signal into an analog signal; and feeding the analog, modulated signal and said analog signal to the analog amplifier circuitry.

Abstract: An amplifier circuit for delivering an output signal which varies in amplitude and in phase or frequency, has a power amplifier, an amplitude feedback circuit and a phase or frequency feedback circuit, both constituting closed loops together with said power amplifier, and at least one of said feedback circuits has its gain controllable in dependency of properties of the input or output signals, or both. A radio transmitter includes such an amplifier circuit, and a cellular telephone includes such a radio transmitter. The invention includes a method for controlling an output state in such a radio transmitter.

Abstract: A method for transforming digital amplitude as well as phase or frequency modulation information into analog signals for controlling analog amplifier circuitry, comprises:

Abstract: An amplifier circuit for delivering an output signal which varies in amplitude and in phase or frequency, has a power amplifier, an amplitude feedback circuit and a phase or frequency feedback circuit, both constituting closed loops together with said power amplifier, and at least one of said feedback circuits has its gain controllable in dependency of properties of the input or output signals, or both.