Integrated circuit
AssigneeSequans Communications
InventorPeter Martin
Life of this patent
Estimating the term…
Abstract
An integrated circuit device has an LC tank circuit for frequency determination, and a switched capacitor circuit for tuning the resonant frequency of the LC tank. The switched capacitor circuit has plural sets of parallel branches, each set comprising a first branch and a second branch, the first and second branches each connecting between a first node and a second node, each branch containing a respective capacitor in series with a switch, the switched capacitor circuit being configured such that, in use, the switch of the first branch is on when the switch of the second branch is off and vice versa.
Claims20
An integrated circuit device having an LC tank circuit for frequency determination, and a switched capacitor circuit for tuning the resonant frequency of the LC tank, the switched capacitor circuit having plural sets of parallel branches, each set comprising a first branch and a second branch, the first and second branches each connecting between a first node and a second node, each branch containing a respective capacitor in series with a switch, the switched capacitor circuit being configured such that, in use, the switch of the first branch is on when the switch of the second branch is off and vice versa.
An integrated circuit device having an RC circuit, and a switched capacitor circuit for controlling the time constant of the RC circuit, the switched capacitor circuit having plural sets of parallel branches, each set comprising a first branch and a second branch, the first and second branches each connecting between a first node and a second node, each branch containing a respective capacitor in series with a switch, the switched capacitor circuit being configured such that, in use, the switch of the first branch is on when the switch of the second branch is off and vice versa.
A method of tuning the resonant frequency of an integrated LC tank circuit for frequency determination, the method adjusting a capacitance of the LC tank by selecting a respective first or a respective second branch in each of plural pairs of parallel branches.
A method of controlling the time constant of an integrated RC circuit, the method adjusting a capacitance of the RC circuit by selecting a respective first or a respective second branch in each of plural pairs of parallel branches.
Dependencies are inferred from the claim text.