Method and apparatus for reducing local oscillator leakage in integrated circuit receivers

A frequency conversion device comprising:

• a resonator circuit;
• an oscillator circuit coupled to said resonator circuit for generating an LO signal;
• a mixer circuit for receiving an RF signal from an RF input node and said LO signal from said oscillator circuit and for generating an IF signal by mixing said RF and LO signals;
• a package encapsulating therein at least a part of said mixer circuit and a part of said oscillator circuit, said package having a plurality of pins electrically coupled to said at least parts of said mixer and oscillator circuits encapsulated therein,
• wherein at least a portion of said resonator circuit is located outside said package, said outside portion of said resonator circuit being connected to said package via a plurality of floating pins, said floating pins being pins not used to couple DC power or ground to said package.

A method of reducing local oscillator leakage in an integrated circuit frequency conversion device comprising the steps of:

• (a) coupling an RF signal to an input pin of the integrated circuit frequency conversion device;
• (b) providing DC voltage to at least one DC power pin of the integrated circuit frequency conversion device;
• (c) providing ground voltage to at least one ground pin of the integrated circuit frequency conversion device;
• (d) coupling at least a portion of a resonator circuit to said integrated circuit frequency conversion device, said coupling of the resonator portion not using any of said DC power pins or ground pins.