H - Electricity – 03 – F
Patent
H - Electricity
03
F
330/103, 330/41
H03F 3/193 (2006.01) H03F 1/42 (2006.01) H03F 1/56 (2006.01) H03F 3/191 (2006.01) H03F 3/195 (2006.01)
Patent
CA 1141442
Abstract A selective amplifier whose gain characteristic is rendered approximately uniform over the entire frequency band to be amplified with no degradationin the S/N ratio. The amplifier consists of a band-pass filter and an amplify- ing element, in which a resistor for eliminating the ripples in the transmission characteristic of the filter is constituted with a feed back resistor for the amplifying element, the coil for the parallel resonance circuit in the filter is constituted as an auto-transformer and the capacitor in the serial resonance circuit of said filter is formed with the capacitance of a capacitive antenna respectively to thereby improve the S/N ratio. The amplifier is suitable to be used at the top of the high frequency stages in a radio receiver. - 16 -
340197
Fujitsu Ten Limited
Kirby Eades Gale Baker
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