The active two-way current sink/source mirror. The input current source is mirrored as a sink current when D1 is forward biased, and transmitted as a source current when D1 is reverse biased

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• Article «Active two-way current mirror»
• Figure 1. The active two-way current sink/source mirror. The input current source is mirrored as a sink current when D1 is forward biased, and transmitted as a source current when D1 is reverse biased
• Figure 2. ATWCM in mirror mode, I₁ sink current generates V_R, forcing A1 to coax Q1 to mirror I₂ = I₁
• Figure 3. ATWCM in transmission mode. A reverse-biased D1 means I₁ has nowhere to go except through the resistors and (saturated and inverted) Q1, where it is transmitted back out as I₂
• Figure 4. Source/sink two-way mirror with a D1 flipped the opposite direction, and Q1 replaced with a PFET
• Figure 5. Accurately symmetrical tri-wave and square-wave result from inherent A1Q2 two-way mirror symmetry