Controllable RF broadband and amplifier with a constant...

Details Controllable RF broadband and amplifier with a constant... Controllable RF broadband and amplifier with a constant...

2007-10-23

2007-10-23

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including plural amplifier channels

C330S278000

Reexamination Certificate

active

10541855

ABSTRACT:
A variable-gain RF amplifier arrangement whose input impedance is essentially independent of the selected gain is proposed, which has a large number of selectable elementary amplifiers, with an input signal being scaled and the input impedance being set to be the same by means of switchable current limiting elements upstream of the elementary amplifiers, which are associated with the elementary amplifiers. The circuit also has a low noise level, which is largely independent of the selected gain, and good linearity. A broadcast radio receiver as well as a receiver for receiving data signals using an amplifier according to the invention are also proposed.

REFERENCES:
patent: 6265936 (2001-07-01), Heigl et al.
patent: 6288608 (2001-09-01), Jadus et al.
patent: 7057457 (2006-06-01), Irvine et al.
patent: 19854847 (2000-06-01), None
patent: 10190378 (1998-07-01), None
Copy of Search Report Dated Jul. 18, 2003.

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