Patent application number | Description | Published |
20090072910 | VOLTAGE-CONTROLLED OSCILLATOR WITH CONTROL RANGE LIMITER - A voltage-controlled oscillator (VCO) comprising a first circuit, a second circuit, a comparator circuit, and a control unit. The first circuit can determine an output common mode voltage associated with an output of the VCO. The second circuit can generate an upper control voltage limit and a lower control voltage limit associated with a control voltage received by the VCO based, at least in part, on the output common mode voltage. The comparator circuit can compare the control voltage to the upper and lower control voltage limits. The control unit can determine whether to change a switched capacitance associated with the VCO based, at least in part, on whether the control voltage is outside the upper and lower control voltage limits, thereby maintaining an optimal region of operation for the control voltage. | 03-19-2009 |
20090285279 | PHASE FREQUENCY DETECTOR WITH PULSE WIDTH CONTROL CIRCUITRY - A phase frequency detector comprising a detection circuit and a reset circuit. The phase frequency detector may receive a feedback signal having a predetermined pulse width. The detection circuit may generate a first control signal based on a reference signal, and a second control signal based on the feedback signal. The reset circuit may generate a reset signal used for resetting the detection circuit based on the first control signal, the second control signal, and the feedback signal. The feedback signal may be tied to the generation of the reset signal such that, during a locked state, the pulse width of the second control signal is approximately equal to the pulse width of the feedback signal, which helps reduce the sensitivity of the circuit to nonlinearities. | 11-19-2009 |
20120098621 | PATTERNED CAPACITOR GROUND SHIELD FOR INDUCTOR IN AN INTEGRATED CIRCUIT - Integrated circuits are disclosed including at least one inductor-capacitor component, where each of the inductor-capacitor components includes an inductor and a capacitor constructed between the inductor and a substrate. The inductor includes at least one metal loop over a shield pattern forming a first capacitor terminal over patterned oxide layer with a second capacitor layer between the patterned oxide layer and the substrate. | 04-26-2012 |