Adaptive radio transceiver with floating MOSFET capacitors

An integrated circuit comprising:

• a first node for receiving a signal;
• a first transistor comprising a gate node and at least one other node, the at least one other node coupled to receive the signal from the first node;
• a second transistor comprising a gate node and at least one other node, the gate node of the second transistor coupled to receive the signal from the gate node of the first transistor;
• and
• a second node coupled to receive the signal from the at least one other node of the second transistor;
• wherein the first transistor and the second transistor provide a capacitance between the first node and the second node.

A tunable capacitor array, comprising:

• a plurality of capacitors each of the capacitors comprising:
• a first node for receiving a signal;
• a first transistor comprising a gate node and at least one other node, the at least one other node coupled to receive the signal from the first node;
• a second transistor comprising a gate node and at least one other node, the gate node of the second transistor coupled to receive the signal from the gate node of the first transistor;
• and
• a second node coupled to receive the signal from the at least one other node of the second transistor;
• wherein the first transistor and the second transistor provide a capacitance between the first node and the second node;
• the first nodes of the capacitors being coupled together and the second nodes of the capacitors being coupled together;
• and
• a plurality of switches each being positioned between a different one of the capacitors and the respective capacitors first or second node.