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Can I adjust R4 and R5 to maintain a 12k input impedance?
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Discussion Overview
The discussion revolves around adjusting resistor values R4 and R5 in a resistor network to maintain an input impedance of 12k ohms. Participants explore the implications of current flow in the circuit and the relationship between the resistors involved.
Discussion Character
- Technical explanation, Conceptual clarification, Debate/contested
Main Points Raised
- One participant expresses confusion about the current flow in the resistor network, suggesting that input and return currents should be equal but noting that some current appears to flow to ground.
- Another participant clarifies that no current actually flows "to ground" in the conventional sense, proposing that the resistors connected to ground should be treated as parallel paths in the circuit.
- A question is raised about whether the two grounded resistors are in parallel with the 12k resistor, which is confirmed by another participant.
- A participant mentions that the 12k represents the input impedance of a receiver IC and indicates a need to increase R4 and R5 to maintain this impedance level.
Areas of Agreement / Disagreement
Participants generally agree on the configuration of the resistors and the nature of current flow, but there is ongoing uncertainty regarding the adjustments needed to maintain the desired input impedance.
Contextual Notes
There may be limitations related to the assumptions about current flow and the specific values of R4 and R5 that have not been fully explored or defined.
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