Abstract: Test apparatus for testing a circuit unit. A first test device is arranged outside the circuit unit. A second test device, which is arranged integrally with the circuit unit, has a sample-and-hold unit for sampling at least one voltage value of an output signal output from the circuit unit and for holding the sampled voltage value, and a logic unit for driving the sample-and-hold unit. The voltage value sampled by the second test device is fed to the first test device as a test result signal.

Abstract: A rechargeable battery unit, which is intended for supplying a voltage to an electrical appliance, is charged by an external charging voltage by a charging circuit. The charging circuit is configured such that a charge regulator controls the charging process, and a monitoring unit monitors the voltage that is applied to the rechargeable battery unit and causes the charging regulator to limit the voltage that is applied to the rechargeable battery unit if any over-voltage occurs.

Abstract: A rechargeable battery unit, which is intended for supplying a voltage to an electrical appliance, is charged by an external charging voltage by a charging circuit. The charging circuit is configured such that a charge regulator controls the charging process, and a monitoring unit monitors the voltage that is applied to the rechargeable battery unit and causes the charging regulator to limit the voltage that is applied to the rechargeable battery unit if any over-voltage occurs.

Abstract: A circuit configuration for supplying voltage to an integrated circuit via a pad that is connected to the input of a Schmitt trigger on the integrated circuit. The pad is also provided for configuring the integrated circuit. The integrated circuit has a multiplicity of voltage supply lines for voltage supply purposes. According to the invention, the pad is connected to a respective voltage supply line via a respective switch, and the switches are switched on or off by a control circuit that is controlled by at least one on-chip control signal.

Abstract: A circuit configuration for supplying voltage to an integrated circuit via a pad that is connected to the input of a Schmitt trigger on the integrated circuit. The pad is also provided for configuring the integrated circuit. The integrated circuit has a multiplicity of voltage supply lines for voltage supply purposes. According to the invention, the pad is connected to a respective voltage supply line via a respective switch, and the switches are switched on or off by a control circuit that is controlled by at least one on-chip control signal.

Abstract: A circuit configuration for noise signal suppression includes an input signal terminal and two inputs being controlled by the input signal terminal. Transfer gates are each connected in series with a respective one of the inputs and have a terminal being connected to the input signal terminal. A transistor is connected as a capacitor in parallel with each of the inputs.

Abstract: A circuit configuration for synchronous clock generation of at least two clock signals, includes an enable stage for receiving a clock signal and enabling the clock signal under the control of an enable signal. A branching stage for receiving the enabled clock signal from the enable stage generates at least two clock signals from the enabled clock signal. Logic and/or driver stages are each connected downstream of the branching stage for receiving a respective one of the clock signals generated by the branching stage. Each of the logic and/or driver stages has an output at which a respective output clock signal can be picked up. Amplifiers are each connected to the output of a respective one of the other stages and are associated with a respective one of the output clock signals, for detecting edges of the output clock signals. A logic array connected to the amplifiers logically links the output signals generated by the amplifiers. The logic array generates the enable signal for controlling the enable stage.