Power oscillator apparatus with transformer-based power combining
First Claim
1. An apparatus, comprising:
- a first oscillator circuit having a first output and a second output;
a second oscillator circuit having a third output and a fourth output;
a first capacitor coupled between the first output and the fourth output;
a second capacitor coupled between the second output and the third output; and
a transformer circuit comprising;
a first primary winding coupled between the first output and a common node;
a second primary winding coupled between the third output and the common node;
a third primary winding coupled between the second output and the common node;
a fourth primary winding coupled between the fourth output and the common node; and
a first secondary winding and second secondary winding coupled in series between fifth and sixth output nodes, wherein the first secondary winding is magnetically coupled to the first and third primary windings, and wherein the second secondary winding is magnetically coupled to the second and fourth primary windings.
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Accused Products
Abstract
An oscillator circuit includes first and second oscillators arranged in a series configuration between a supply voltage node and a reference voltage node. The first and second oscillators are configured to receive a synchronizing signal for controlling synchronization in frequency and phase. An electromagnetic network provided to couple the first and the second oscillators includes a transformer with a primary circuit and a secondary circuit. The primary circuit includes a first portion coupled to the first oscillator and second portion coupled to the second oscillator. The first and second portions are connected by a circuit element for reuse of current between the first and second oscillators. The oscillator circuit is fabricated as an integrated circuit device wherein the electromagnetic network is formed in metallization layers of the device. The secondary circuit generates an output power combining power provided from the first and second portions of the primary circuit.
30 Citations
16 Claims
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1. An apparatus, comprising:
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a first oscillator circuit having a first output and a second output; a second oscillator circuit having a third output and a fourth output; a first capacitor coupled between the first output and the fourth output; a second capacitor coupled between the second output and the third output; and a transformer circuit comprising; a first primary winding coupled between the first output and a common node; a second primary winding coupled between the third output and the common node; a third primary winding coupled between the second output and the common node; a fourth primary winding coupled between the fourth output and the common node; and a first secondary winding and second secondary winding coupled in series between fifth and sixth output nodes, wherein the first secondary winding is magnetically coupled to the first and third primary windings, and wherein the second secondary winding is magnetically coupled to the second and fourth primary windings. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus comprising:
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a first oscillator circuit having a first output and a second output, wherein the first oscillator circuit comprises a pair of transistors coupled to the first and second outputs and having control terminals coupled together to receive a bias signal; a current source configured to generate a synchronizing current pulse; and a current mirror configured to mirror the synchronizing current pulse to the control terminals of the pair of transistors as the bias signal, wherein the bias signal is a synchronizing signal for synchronizing frequency and phase of oscillator operation; a second oscillator circuit having a third output and a fourth output; and a transformer circuit comprising; a first primary winding coupled between the first output and a common node; a second primary winding coupled between the third output and the common node; a third primary winding coupled between the second output and the common node; a fourth primary winding coupled between the fourth output and the common node; and a first secondary winding and second secondary winding coupled in series between fifth and sixth output nodes, wherein the first secondary winding is magnetically coupled to the first and third primary windings, and wherein the second secondary winding is magnetically coupled to the second and fourth primary windings.
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8. An apparatus comprising:
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a first oscillator circuit having a first output and a second output; a second oscillator circuit having a third output and a fourth output; wherein the first oscillator circuit comprises a pair of transistors coupled to the first and second outputs and having control terminals coupled together to receive a bias signal, wherein the bias signal is a synchronizing signal for synchronizing frequency and phase of oscillator operation, wherein the synchronizing signal has a synchronization frequency equal to two times an oscillation frequency of the first and second oscillator circuits; and a transformer circuit comprising; a first primary winding coupled between the first output and a common node; a second primary winding coupled between the third output and the common node; a third primary winding coupled between the second output and the common node; a fourth primary winding coupled between the fourth output and the common node; and a first secondary winding and second secondary winding coupled in series between fifth and sixth output nodes, wherein the first secondary winding is magnetically coupled to the first and third primary windings, and wherein the second secondary winding is magnetically coupled to the second and fourth primary windings.
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9. An apparatus, comprising:
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a first oscillator circuit having a first output and a second output; a second oscillator circuit having a third output and a fourth output; a first capacitor coupled between the first output and the fourth output; a second capacitor coupled between the second output and the third output; and a transformer having a primary winding including a first portion coupled between the first and second outputs of the first oscillator circuit and a second portion coupled between the third and fourth outputs of the second oscillator circuit, and further including a secondary winding having a third portion coupled in series with a fourth portion, wherein the third portion is magnetically coupled to the first portion of the primary winding and wherein the fourth portion is magnetically coupled to the second portion of the primary winding; wherein the first and second oscillator circuits and the transformer are integrated in an integrated circuit device including a plurality of metallization levels; and wherein said primary and secondary windings are formed in said plurality of metallization layers. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification