Continuous time programmable analog block architecture

Details Continuous time programmable analog block architecture Continuous time programmable analog block architecture

1995-03-01

1996-11-12

Mai, Tan V.

Boots, shoes, and leggings

G06G 700

Patent

active

055746780

ABSTRACT:
A programmable analog circuit apparatus receives a differential analog input signal and provides a processed differential analog output signal. The programmable analog circuit apparatus includes a first input transconductor, a differential amplifiers, and a feedback transconductor. The first input transconductor has a programmable transconductance and includes an input transconductor positive input terminal and an input transconductor negative input terminal and an input transconductor positive output terminal and an input transconductor negative output terminal. The positive and negative input terminals are coupled to receive the differential analog input signal. The differential amplifier includes first and second amplifier input terminals and first and second amplifier output terminals. The positive and negative input transconductor output terminals are coupled to the first and second differential amplifier input terminals. The amplifier output terminals are coupled to the first and second amplifier input terminals. The amplifier provides the processed differential analog output signal via the amplifier output terminals. The feedback transconductor includes a positive feedback transconductor input terminal and a negative feedback transconductor input terminal and a positive feedback transconductor output terminal and a negative feedback transconductor output terminal. The positive and negative feedback transconductor input terminals are coupled to the first and second amplifier output terminals and the positive and negative feedback transconductor output terminals are coupled to the first and second amplifier input terminals. The feedback transconductor output terminals has a high output impedance.

REFERENCES:
patent: 5017146 (1992-04-01), El-Ayat
Scott D. Willingham, Kenneth W. Martin, and A. Ganesa, "A BiCMOS Los-Distortion 8-MHz Los-Pass Filter", IEEE Journal of Solid-State Circuits, vol. 28, No. 12, Dec. 1993, pp. 1234-1245.

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