Lab Journal
Version 1 (Andrew Starr, 09/09/2012 01:40 am) → Version 2/17 (Andrew Starr, 10/19/2012 05:06 pm)
h1. Lab Journal
h2. 20 Oct, 2012 - Tunnelling Current Amplifier simulation
The tunnelling current amplifier is an example of a _transimpedance_ amplifier: it converts a current input into a voltage output. This amplifier is a critical circuit in the microscope, so I have taken advantage of available electronic simulation software to test and tune the design before committing to a PCB.
h3. Bandwidth vs noise
In a transimpedance amplifier there is an unavoidable tradeoff between the bandwidth of the amplifier response and its output noise.
h2. 20 Oct, 2012 - Tunnelling Current Amplifier simulation
The tunnelling current amplifier is an example of a _transimpedance_ amplifier: it converts a current input into a voltage output. This amplifier is a critical circuit in the microscope, so I have taken advantage of available electronic simulation software to test and tune the design before committing to a PCB.
h3. Bandwidth vs noise
In a transimpedance amplifier there is an unavoidable tradeoff between the bandwidth of the amplifier response and its output noise.