Oscillator circuit using bonding wires for inductors and having a resonance transformation circuit
AssigneeInfineon Technologies AG
InventorJohann Traub
Life of this patent
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Abstract
An oscillator circuit includes an oscillator core having two capacitances, two inductors designed as bonding wires, and a de-attenuation amplifier coupled to the oscillator core. The inductors of the oscillator core, which is preferably embodied to be tunable, are connected to a leadframe by a respective terminal. A chip including the oscillator core and the deattentuation amplifier is configured on the leadframe. A resonance transformation circuit is preferably provided for coupling the oscillator core and the de-attenuation amplifier. The oscillator can be used in a mobile radio when there are high requirements with regard to the phase noise.
Claims8
An oscillator circuit, comprising:
- a supply voltage source having a supply potential terminal and a reference-ground potential terminal;
- a carrier;
- a semiconductor chip having a front side and a rear side fixed to said carrier;
- an oscillator core integrated on said semiconductor chip, said oscillator core including a pair of first circuit nodes, a first capacitance, a first inductor connected to said first capacitance at a first one of said pair of first circuit nodes, a second capacitance, and a second inductor connected to said second capacitance at a second one of said pair of first circuit nodes;
- a de-attenuation amplifier integrated on said semiconductor chip, said de-attenuation amplifier coupled to said oscillator core and to said supply voltage source;
- a resonance transformation circuit for coupling said oscillator core and said de-attenuation amplifier;
- a pair of second circuit nodes;
- a third inductor connected to a first one of said pair of second circuit nodes;
- a fourth inductor connected to a second one of said pair of second circuit nodes;
- and
- a pair of contact points;
- said first inductor formed as a bonding wire having a first terminal connected to a first one of said pair of contact points and a second terminal connected to said carrier;
- said second inductor formed as a bonding wire having a first terminal connected to a second one of said pair of contact points and a second terminal connected to said carrier;
- said first one of said pair of contact points connected to said first one of said pair of first circuit nodes;
- said second one of said pair of contact points connected to said second one of said pair of first circuit nodes;
- said resonance transformation circuit including a first coupling capacitor connected to said first one of said pair of first circuit nodes and to said first one of said pair of second circuit nodes;
- said resonance transformation circuit including a second coupling capacitor connected to said second one of said pair of first circuit nodes and to said second one of said pair of second circuit nodes.
Dependencies are inferred from the claim text.