Analog Input Test Board

A project log for 60MHz Bandwidth 250Msps Probe-Scope

The Probe-Scope is an open source 60MHz 250Msps oscilloscope probe with all guts built right in, that plugs directly into your PC via USB

Mark OmoMark Omo 06/14/2019 at 04:410 Comments

We created a test board for the analog input section of the Probe-Scope to test the frequency response and the noise floor. This board contains the input divider/buffer, vertical offset amplifier, and programmable gain amplifier (with filters); it connects via SMA to a companion digital test board which hosts the ADC and necessary acquisition hardware. The schematic of the analog test board is shown below.