Chapter 4 Signals Analog and digital Aperiodic and periodic signals Analog signals WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

Transformation of Information Figure 4-1 Transformation of Information to Signals WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

Analog and Digital Clocks Figure 4-2 Analog and Digital Clocks WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

Analog and Digital Signals Figure 4-3 Analog and Digital Signals WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

Periodic Signals  The McGraw-Hill Companies, Inc., 1998 Figure 4-4 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

Aperiodic Signals  The McGraw-Hill Companies, Inc., 1998 Figure 4-5 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

Sine Wave  The McGraw-Hill Companies, Inc., 1998 Figure 4-6 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998