52 lines
979 B
Markdown
52 lines
979 B
Markdown
```python
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import matplotlib.pyplot as plt
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import numpy as np
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from pint import UnitRegistry
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unit = UnitRegistry()
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unit.formatter.default_format = "~"
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unit.setup_matplotlib()
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gain_first_stage = 10e6 * unit.V / unit.A
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gain_second_stage = 100e3 / 1e3
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tunnel_current_in = np.linspace(1e-12, 10e-9, 100) * unit.A
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volts_out = tunnel_current_in * gain_first_stage * gain_second_stage
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plt.xscale("log")
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plt.plot(tunnel_current_in, volts_out)
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xticks = [1e-12, 10e-12, 100e-12, 1e-9, 10e-9] * unit.A
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plt.xticks(xticks, [f'{t.to("nA"):.3f~}' for t in xticks], minor=False)
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plt.xlabel("Tunneling Current")
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plt.yscale("log")
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yticks = [0.001, 0.010, 0.1, 1.0, 5] * unit.V
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plt.yticks(yticks, [f'{t.to("V"):.3f~}' for t in yticks], minor=False)
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plt.ylabel("Preamp Voltage")
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plt.grid(True, "both")
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```
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```python
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v = 0.359 * unit.V
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a = v / (gain_first_stage * gain_second_stage)
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a.to("pA")
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```
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359.0 pA
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```python
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```
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