Biomedical Engineering Reference
In-Depth Information
Sample rate = 400 kSa/s
(a)
Sample rate = 80.0 kSa/s
(b)
FIGURE 17.19
The differential photoelectric response of a bR-based photoreceptor to a step light signal having a duration of
(a) 2 s and (b) 33 ms.
amplifier. Here, the photoreceptor response time is on the order of 20 ms, but this is caused
by the integration time of the switched integrator that is set to 20 ms in the measurement.
To reduce the response time, the integration time must be decreased; however, lower
sensitivity is the consequence.
17.4.5
Pixel Uniformity
Variations in light sensitivity may occur between individual pixels within the bR
photoreceptor array due to variations in local fabrication conditions and lead resistances of
