Innovative Solutions for Single Supply Challenges in Receiver Circuits

This content showcases innovative solutions for addressing challenges in single supply output signals within receiver circuits. It includes detailed diagrams and explanations of dual supply setups, diamond plots, common mode resistors, and output range analyses. The provided visuals and descriptions offer valuable insights and strategies for optimizing performance and ensuring efficient operation of receiver circuits in various scenarios.

• Receiver Circuits
• Single Supply
• Dual Supply
• Common Mode Resistor
• Output Range Analysis

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Uploaded on Feb 27, 2025 | 0 Views

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Presentation Transcript

1. 4 to 20 mA receiver 1

2. Dual supply 2.50 T Out 3V Ref 501.97m 250.00m ++ Out R3 12.5 + V - IS1 10m U1 INA351_G10 Vin Vin -2V 50.00m 4.00m 12.00m 20.00m Input current (A) 2

3. Dual supply diamond plot 3

4. Single supply challenge When used in single supply output is limited for larger output signal. Best range is for common mode equal to 1.6V 4

5. Single supply solution 2.00 T Out 3V 401.99m a 1.60 Vcm Ref ++ Out + R3 10 V 320.00m 200.00m - IS1 10m U1 INA351_G10 Vin b Vin -2V a CS1 Vcm 40.00m N1 N2 N3 4.00m 12.00m 20.00m Out(V) R1 75 Input current (A) b Use a common mode resistor. Vcm = (Va + Vb)/2 +Vb. At 20mA, Vcm = (20mA*85 +20mA*75 )/2=1.6V At 20mA, Vout = 20mA*10*10= 2V, This gives a lot of margin in output vs common mode 5

6. Single supply solution The output range common mode margin is circled in blue 6

7. SPICE Files 7