Patent attributes
In-system signal monitoring using an integrated circuit such as a programmable logic device is described. An analog-to-digital converter is disposed in the programmable logic device. A sampling bridge is coupled to provide an analog input to the analog-to-digital converter and to receive first signaling of a first frequency. A signal generator is configured to provide second signaling at a second frequency which is a fraction of the first frequency. Sample window circuitry is coupled to receive the second signaling and configured to provide third signaling to the sampling bridge at least partially responsive to the second signaling and at least partially responsive to an adjustable impedance setting of the sample window circuitry. The sample window circuitry is configured to provide an adjustable sample window within a pulse-width range.
