A device for receiving a RF signal over multiple channels, a receiver incorporating the device, a method of providing digital calibration values for a digitally-tunable resonant circuit of the device, and a method of processing an RF signal. A ratio of the long side with respect to the short side of the magnetic bias magnet 11 in length is in a range of 5 to 200. The method also includes establishing a slope of the power delivered to the motor. The optical device is in communication with a first computer. At least one difference in a number of gates traversed by an edge of the signal in the ring oscillator and a number of gates traversed by a corresponding edge of the pulse in the delay chain is measured when the pulse reaches the far end of the delay chain.