Amplifiers – Signal feedback – Phase shift means in loop path
Patent
1998-05-06
1999-11-30
Mottola, Steven J.
Amplifiers
Signal feedback
Phase shift means in loop path
330109, H03F 134
Patent
active
059949562
ABSTRACT:
The present invention is a device for feedback compensation in amplifiers having at least one voltage gain stage wherein both capacitive and inductive components are used in conjunction with resistive components. There is a first resistor, connected between the output node and the feedback node of the amplifier system, a capacitor, connected in parallel with the first resistor, a second resistor, and an inductor, connected in series with said second resistor. The series combination of the second resistor and the inductor is connected between the feedback node and the reference potential of the amplifier system (usually system common for a non-inverting amplifier system, or the input signal source for an inverting amplifier system). The capacitor advances the phase angle of the current flowing through the feedback network device while the inductor advances the phase angle of the voltage appearing between the feedback node of the amplifier system and the reference potential of same.
REFERENCES:
patent: 3816661 (1974-06-01), Huszty et al.
patent: 4002994 (1977-01-01), Fender
patent: 4470020 (1984-09-01), Mohr
patent: 5072200 (1991-12-01), Ranky
Burr-Brown IC Applications Handbook, 1994, pp. 194 to 206.
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