Amplifiers – With semiconductor amplifying device – Including current mirror amplifier
Patent
1995-07-30
1996-08-20
Mottola, Steven
Amplifiers
With semiconductor amplifying device
Including current mirror amplifier
330290, 330302, H03F 319
Patent
active
055482481
ABSTRACT:
A radio frequency (RF) amplifier circuit having an input terminal, an output terminal, a power supply terminal, and a control node, includes first, second, and third transistors interconnected in a modified current source or current mirror configuration with first, second, and third resistors and a matching circuit to produce a desired bias current according to the magnitude of a control voltage coupled to the control node while producing an amplified output radio frequency signal at the output terminal from an input radio frequency signal coupled to the input terminal. Implemented with bipolar transistors, enhancement mode field effect transistors, or depletion mode field effect transistors, the circuit achieves two-stage amplification with simplified interstage coupling and therefore fewer components and less size and cost.
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Hanson Loyal M.
Mottola Steven
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