Fail-safe active bandpass filter using a modified twin-T filter

Details Fail-safe active bandpass filter using a modified twin-T filter Fail-safe active bandpass filter using a modified twin-T filter

1979-11-26

1981-09-15

Nussbaum, Marvin L.

Amplifiers

With semiconductor amplifying device

Including signal feedback means

330206, 333172, H03H 1112, H03H 7065

Patent

active

042900271

ABSTRACT:
A fail-safe active bandpass filter circuit is disclosed; that is, one having voltage gain and which is arranged to be fail-safe in the sense that opens, shorts and component value changes will not cause the circuit to self-oscillate and thereby produce a spurious signal that would cause unsafe effects.

REFERENCES:
patent: 3174111 (1965-03-01), Grover
patent: 3725802 (1973-04-01), Darrow
patent: 4001710 (1977-01-01), Darrow

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