Chapter 2: Hardware Interface Description
January 1, 2006 Module Hardware Description 31
Figure 2-19 shows a differential speaker circuit, Figure 2-20 shows a single-ended speaker circuit
and Table 2-8 gives the speaker specifications.
Figure 2-19: Differential Speaker Circuit
Important: For safety regulations it is important to place series resistors on the speaker output
lines, as illustrated in Figure 2-19. The resistors value should be R = 0
Ω at the
design stage, but may be changed to a different value during audio safety testing, in
case speaker level limitation is required.
Figure 2-20: Single-ended Speaker Circuit