Abstract: The invention concerns a controllable current source or “charge pump” (12) in an integrated circuit, comprising two supply terminals (K1, K2) for the application of two supply potentials (V1, V2) as well as an output terminal (Kout) for the delivery of an output current, connected via a first controllable current path (T1) with the first supply terminal (K1), and via a second controllable current path (T2) with the second supply terminal (K2). In order to improve the current source (12) with regard to the quality of the output signal, it is provided according to the invention that the controllable current source (12) furthermore has a replica (T1?, T2?) of the current paths (T1, T2) in their non-controlled state, of which a replica output terminal (Kout?) is connected via a current mirror (T5 to T8) with the output terminal (Kout).

Abstract: The invention concerns the adjustment of an oscillation frequency of an oscillator, in particular the digital coarse adjustment of a PLL oscillator by means of a circuit arrangement comprising at least one pair of capacitors (C, C?), of which first terminals are connected with the oscillator, and second terminals can selectively be connected by means of a switching arrangement with a first reference potential (vss), in order to incorporate the capacitor pair (C, C?) into an oscillating circuit of the oscillator, wherein the circuit arrangement comprises: first FETs (T1, T1?) for the respective connection of the second terminals with the first reference potential (vss), a second FET (T2) for the connection of the second terminals with each other, and third FETs (T3, T3?) for the respective connection of the second terminals with a second reference potential (vdd), which differs from the first reference potential (vss).

Abstract: The invention concerns a controllable current source or “charge pump” (12) in an integrated circuit, comprising two supply terminals (K1, K2) for the application of two supply potentials (V1, V2) as well as an output terminal (Kout) for the delivery of an output current, connected via a first controllable current path (T1) with the first supply terminal (K1), and via a second controllable current path (T2) with the second supply terminal (K2). In order to improve the current source (12) with regard to the quality of the output signal, it is provided according to the invention that the controllable current source (12) furthermore has a replica (T1?, T2?) of the current paths (T1, T2) in their non-controlled state, of which a replica output terminal (Kout?) is connected via a current mirror (T5 to T8) with the output terminal (Kout).

Abstract: An inductive element (10) of an integrated circuit, comprising at least one turn (12), which is formed by an integrated elongated track (14) made of a conductive material, wherein the interior margin of the conductive track (14) comprises at least one recess (30). The invention makes it possible in particular to increase the inductivity of the element (10) in a given available space on the substrate of an integrated circuit.

Abstract: An inductive element (10) of an integrated circuit, comprising at least one turn (12), which is formed by an integrated elongated track (14) made of a conductive material, wherein the interior margin of the conductive track (14) comprises at least one recess (30). The invention makes it possible in particular to increase the inductivity of the element (10) in a given available space on the substrate of an integrated circuit.