Patent Document ID: 5574678
Application ID: 08396994
Patent Flag: 1

Claim One:
1. A programmable analog circuit apparatus, the programmable analog circuit apparatus receiving a differential analog input signal and providing a processed differential analog output signal comprising a first input transconductor, the input transconductor having a programmable transconductance, the input transconductor having an input transconductor positive input terminal and an input transconductor negative input terminal coupled to receive the differential analog input signal and an input transconductor positive output terminal and an input transconductor negative output terminal; an amplifier, the amplifier including first and second amplifier input terminals and first and second amplifier output terminals, the positive and negative input transconductor output terminals being coupled to the first and second amplifier input terminals, the amplifier output terminals being coupled to the first and second amplifier input terminals, the amplifier output terminals providing the processed differential analog output signal; a feedback transconductor, the feedback transconductor including a feedback transconductor positive input terminal and a feedback transconductor negative input terminal and a feedback transconductor positive output terminal and a feedback transconductor negative output terminal, the feedback transconductor positive and negative input terminals being coupled to the first and second amplifier output terminals and the feedback transconductor positive and negative output terminals being coupled to the first and second amplifier input terminals, the feedback transconductor output terminals having a high output impedance.