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ISD1000A View Datasheet(PDF) - Unspecified

Part NameDescriptionManufacturer
ISD1000A Single-Chip Voice Record/Playback Devices 16- and 20-Second Durations ETC
Unspecified 
ISD1000A Datasheet PDF : 20 Pages
First Prev 11 12 13 14 15 16 17 18 19 20
ISD1000A Series
APPLICATION EXAMPLE – PASSIVE COMPONENT FUNCTIONS
Product Data Sheets
Part
R1
R2
R3, R4
R5
C1, C5
Function
Microphone power supply
decoupling
Release time constant
Microphone biasing resistors
Series limiting resistor
Microphone DC–blocking capacitor
Low-frequency cutoff
C2
C3
C4
-1
C6, C7, C8
Attack/Release time constant
Low-frequency cutoff capacitor
Microphone power supply
decoupling
Power supply capacitors
Comments
Reduces power supply noise
Sets release time for AGC
Provides biasing for microphone operation
Reduces level at high supply voltages
Decouples microphone bias from chip. Provides
single-pole low-frequency cutoff and common-mode
noise rejection
Sets attack/release time for AGC
Provides additional pole for low-frequency cutoff
Reduces power supply noise
Filter and bypass of power supply
1–18
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