Abstract: An integrated circuit (IC) resonator in which resonator parameters potentially affected by IC fabrication processes are correctable after fabrication. Resonance frequency tuning is effected by forming each feedback capacitor in a pair of integrator circuits to include a variable capacitance device, such as a varactor diode. A tuning signal is applied to the varactor diode to adjust the total capacitance value and, therefore, the resonance frequency. Similarly, the quality (Q) factor of the resonator is adjusted by providing a variable capacitance in an RC (resistance-capacitance) network coupling the output of one of the integrator circuits to the input of the other. The variable capacitance in the RC network permits adjustment of phase in the event that the integrator circuits do not provide a desired 180° total phase shift.

Abstract: A circuit for supplying selected currents to a charge pump without harmful effects arising from operation of current switches in the charge pump. A charge pump current setting is applied in digital form to a set of two-position switches coupled to binary-weighted current sources. Currents from the sources selected by the switches are combined, and the total current is mirrored to the charge pump. Simultaneously, those of the binary-weighted current sources not selected by the switches to contribute to the charge pump current are separately combined, and this total current is mirrored to an electrical replica of the charge pump. Thus the currents supplied to the charge pump and to the replica charge pump are complementary in the sense that they always add to a constant total current drawn from a common power supply. Therefore, abrupt changes in current load are avoided and switching noise effects are minimized.

Abstract: An integrated switched filterbank and method of forming an integrated switched filterbank is disclosed. One embodiment includes a switched filterbank that includes an active subassembly, a plurality of active devices mounted to the active subassembly, and a stripline filter subassembly stacked below the active subassembly. The stripline filter subassembly includes a plurality of stripline filters of varying passbands embedded therein, wherein the plurality of stripline filters are coupled to active devices mounted on the active subassembly through a set of contacts extending from the stripline filters through the active subassembly to at least one of the plurality of active devices.

Abstract: A cuff link assembly includes an elongated stem member, an ornament member on one end of the stem member, a cross member and a fastening assembly pivotally securing the cross member on the opposite end of the stem member. The fastening assembly includes a pair of non circular cam structures on the stem member and a pair of cam plates having non circular cam sockets formed therein on the cross member, and the cam structures are received in the cam sockets for releaseably retaing the cross member in various different angular positive relative to the stem member.