Selective amplifier having common base connected transistor and

Details Selective amplifier having common base connected transistor and Selective amplifier having common base connected transistor and

1984-11-14

1986-09-23

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including frequency-responsive means in the signal...

330305, H03F 3191

Patent

active

046138242

ABSTRACT:
In a selective amplifier stage with a frequency-selective input filter to which there is coupled inductively an amplifier transistor, there is provided for the inductive coupling of the amplifier transistor to the filter a coil which is magnetically coupled to the coil of the input filter. The coupling coil is of such dimensions that when the input filter is aligned to maximum amplification of the stage, the source impedance driving the transistor is greater than the input impedance of the amplifier transistor.

REFERENCES:
patent: 2920277 (1960-01-01), Overbeek
patent: 3001146 (1961-09-01), Knol et al.

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