Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras
A method of producing a linear current signal in a baseband Voltage - to-Current (V-I) converter
Categories for this Invention
Technology: Voltage to current converter
Industry/Application: RF & Microwave systems, Communication Systems, Electric Vehicle, Medical Equipment, & etc.;
Market: The global power converter market is projected to reach at a CAGR of 7.8% during the period (2024-32).
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Problem Statement
- The problem statement discussed in the present invention is how to develop an up-conversion mixer with the improved linearity and power efficiency by employing a closed loop negative feedback control mechanism.
- Hence, subject invention addresses the issue.
Technology
- Present patent discussed a baseband Voltage-to-Current (V-I) converter.
- Said V-I converter comprises a feedback converter configured to
- receive at least one first current signal from at least one first power transistor in a first stage & at least one second current signal from at least one second power transistor in a second stage;
- produce at least one feedback current signal in said first stage & said second stage by sensing said at least one first current signal from said at least one first power transistor in said first stage & said at least one second current signal from said at least one second power transistor in said second stage.
- Said V-I converter comprises an operational amplifier configured to:
- receive a plurality of said feedback current signals & at least one reference current signal obtained from at least one input voltage signal;
- compare the reference current signal with received plurality of feedback current signals;
- send an output voltage signal to the first power transistor in the first stage & the second power transistor in the second stage; and
- produce a liner output current signal based on the output voltage signal.
Key Features / Value Proposition
- Provides mechanism for an up-conversion mixer with the improved linearity and power efficiency by employing a closed loop negative feedback control mechanism.
- Facilitates a baseband voltage–to–Current (V-I) converter operating in a class-AB mode.
- Facilitates a single stage error amplifier to drive one or more power transistors to operate in negative feedback.
- Said invention is invented a way to directly sense the current driven into the mixer switches (ip,bb and im,bb in FIG. 1)
Questions about this Technology?
Contact For Licensing
sm-marketing@imail.iitm.ac.in
ipoffice2@iitm.ac.in
Research Lab
Prof. Nagendra Krishnapura
Department of Electrical Engineering
Intellectual Property
IITM IDF Ref. 1091
IN Patent No. 481665 (Granted)
Technology Readiness Level
TRL-4
Technology validated in Lab