Low-noise differential bias circuit and differential signal...

Details Low-noise differential bias circuit and differential signal... Low-noise differential bias circuit and differential signal...

2008-01-29

2008-01-29

Le, Lana (Department: 2618)

Telecommunications

Transmitter and receiver at same station

With a common signal processing stage

C455S073000, C455S063100, C455S039000, C455S091000, C455S333000, C455S323000, C455S326000, C455S501000, C455S500000

Reexamination Certificate

active

11038415

ABSTRACT:
A low-noise differential bias circuit is provided which obtains excellent noise characteristics while ensuring excellent distortion characteristics. A collector of a transistor Q11is connected to a voltage supply point (Vcc) via a resistor R15. A base of the transistor Q11is connected to a base of a transistor Q1via resistors R13, R11connected in series. A connection point between the resistors R11, R13is connected to the collector of the transistor Q11. A collector of a transistor Q12is connected to the voltage supply point at connection point A via a resistor R16. A base of the transistor Q12is connected to a base of a transistor Q2via resistors R14, R12connected in series. A connection point between the resistors R12, R14is connected to the collector of the transistor Q12. By this configuration, a high frequency ground is performed at the connection point A.

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