Developing the project schematic diagram
The entire circuit diagram for the oscilloscope project is organized into six hierarchical KiCad sheets as shown in the following figure:
Figure 6.15 – Project schematic sheets
The contents of each sheet are as follows:
- Analog Inputs: This portion of the circuitry receives an analog input from a standard oscilloscope probe in the range ±10 V and transforms it into a differential signal in the range ±1.0 V for input to the ADC.
- ADC: This portion of the circuit connects the ±1.0 V analog signal to the ADC input pins. This diagram also connects a 100 MHz digital clock signal from the Arty board to the ADC. The ADC provides high-speed LVDS differential outputs for two lanes (OUT1A and OUT1B) as well as a data clock (DCO) that connect to Arty board inputs. The ADC used in the project is the Linear Technology LTC2267-14, a dual-channel 14-bit ADC capable of 105 million samples per second...
