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US 6,480,066 B1Granted
Amplifiers
AssigneeMitel Semiconductor Limited
InventorArshad Madni
Life of this patent
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Abstract
An AC voltage amplifier arrangement comprising an input stage 1 having an input, an amplifier 3 connected in series shunt feedback mode, and an output, further comprises a variable gain amplification stage 2 having an input coupled to the output of said input stage 1, and an output. The amplifiers 3, 5 of the input and variable gain amplification stages 1, 2 are arranged to operate in current mode.
Claims13
An AC voltage amplifier arrangement, comprising:
- a) an input stage including a transconductance amplifier having an input and an output;
- b) a shunt feedback path connected between said input and said output of said transconductance amplifier and providing a constant feedback factor, said feedback path including a unity gain buffer having an input connected to said output of said transconductance amplifier;
- and
- c) a current steering second stage cascode-connected to said transconductance amplifier whereby an output current at said output of said transconductance amplifier passes through said second stage.
1 more element
Dependencies are inferred from the claim text.