Balanced-to-unbalanced transformer and amplifier circuit module

Details Balanced-to-unbalanced transformer and amplifier circuit module Balanced-to-unbalanced transformer and amplifier circuit module

2011-07-12

2011-07-12

Takaoka, Dean O (Department: 2817)

Wave transmission lines and networks

Coupling networks

Balanced to unbalanced circuits

C333S246000

Reexamination Certificate

active

07978021

ABSTRACT:
A balanced-to-unbalanced transformer includes a +90° phase shift circuit, which is disposed between a branch point connected to an unbalanced terminal and a first terminal, and a −90° phase shift circuit, which is disposed between the branch point and a second terminal. A first inductor is connected between the first terminal and a power supply terminal, and a second inductor is connected between the branch point and the power supply terminal. A power-supply-terminal-side capacitor is connected in shunt between the power supply terminal and a ground. A second-terminal-side series inductor is connected in series between the branch point and the second terminal.

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Official Communication issued in corresponding Japanese Patent Application No. 2008-162328, mailed on Mar. 23, 2010.
Bakalski et al., “A Fully Integrated 5.3 GHz, 2.4 V., 0.3 W SiGe-Bipolar Power Amplifier With 50 Ω Output,” IEEE Journal of Solid State Circuits, vol. 39, Issue 7, Jul. 2004, pp. 1006-1014, USA.

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