Active mixer with self-adaptive bias feedback

Details Active mixer with self-adaptive bias feedback Active mixer with self-adaptive bias feedback

2005-11-07

2008-10-14

Nguyen, Tony T (Department: 2618)

Telecommunications

Transmitter

Power control, power supply, or bias voltage supply

C455S230000, C455S333000

Reexamination Certificate

active

07437131

ABSTRACT:
An active mixer with self-adaptive bias feedback is described and resolves a poor linearity, inconvenient design of a bias circuit, and other defects of a conventional mixer. The dual self-feedback bias structure according to this invention is used. The active mixer with self-adaptive bias feedback has a power supply, an RF input match/drive unit, a local oscillator input match/drive unit, a mixer core unit, a self-adaptive twin bias circuit and an IF output match/buffer unit. This invention improves the linearity of a conventional mixer and does not affect other characteristics. There are fewer components in this invention; an area of the mixer is thus smaller. Further, this invention may improve temperature response, increase yield factor, and lower unit cost. The dual self-feedback bias structure is designed for further application to other semiconductor manufacturing processes, components, and microwave products.

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