Circuit used to test the impedance of the Figure 3 current source

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Other Materials from the Main Document

• Article «A precision, voltage-compliant current source»
• Figure 1. Current versus voltage characteristics of a DN2540 depletion mode MOSFET and the circuit of a simple current source made with one
• Figure 2. A current source with a more predictable current, left (IXYS) and a voltage regulator which could be employed as a current source with a more predictable current, right (Texas Instruments)
• Figure 3. This circuit delivers predictable currents to U₁ and M₁ and therefore to a load. It's a true two-terminal current source which accommodates load connection to both low and high side
• Figure 4. Circuit used to test the impedance of the Figure 3 current source
• Figure 5. Plotted curves of Figure 3 current source impedance