Telit Wireless Solutions GE863-QUAD, GE863-PY manual 10.1, 10.2, 10.3, 10.4, 11.1, 11.2

				GE863-QUAD
				GE863-PY
				1vv0300715 Rev. 1 - 19/09/06
7.4		Microphone Biasing		36
	7.4.1		Balanced Microphone Biasing	36
	7.4.2		Unbalanced Microphone Biasing	37
7.5		Microphone Buffering		39
	7.5.1		Buffered Balanced Mic	39
	7.5.2		Buffered Unbalanced (Single Ended) Microphone	41
8	OUTPUT LINES (Speaker)			44
8.1		Short description		44
8.2		Output Lines Characteristics		45
8.3		General Design Rules		46
	8.3.1		Noise Filtering	46
8.4		Handset Earphone Design		47
8.5		Hands-Free Earphone (Low Power) Design		48
8.6		Car Kit Speakerphone Design		49
8.7		The Evaluation Kit for Telit Modules EVK2		50
	8.7.1		Short Description	50
	8.7.2		EVK2 Audio Lines Characteristics	51
9	SIM DESIGN GUIDES			52
9.1		Data Integrity		52
9.2		EMI/EMC		52
9.3		ESD		52
9.4		SIM Supply		53
9.5		SCHEMATIC		53
9.6		LAYOUT		54
10	General Purpose I/O			55
10.1			Using a GPIO Pad as INPUT	55
10.2			Using a GPIO Pad as OUTPUT	55
10.3			Using the Alarm Output GPIO6	56
10.4			Using the Buzzer Output GPIO7	56
11	DAC and ADC section			57
11.1			DAC Converter	57
	11.1.1		Description	57
	11.1.2		Enabling DAC	58
	11.1.3 Low Pass Filter Example			58
11.2			ADC Converter	59
	11.2.1		Description	59
	11.2.2		Using ADC Converter	59

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