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Teilenummer | BL1110A |
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Beschreibung | Low voltage versatile transmission IC | |
Hersteller | BELLING | |
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Gesamt 8 Seiten DESCRIPTION:
BL1110A
BL1110A(BL1001) is a low voltage versatile transmission IC. It offers the
entire microphone, receive and line interface functions required in telephone sets. It
performs the interface between the line and the transducers of the handset. It includes
a DTMF amplifier, a microphone amplifier and a receive amplifier. The selection
between the microphone amplifier and the DTMF amplifier is made with a “MUTE”
function. The MUTE/input switches-off both the microphone and the receive
amplifiers and switches-on the DTMF amplifier.
FEATURES
• Low DC line voltage: operates down to 1.6 V
• Voltage regulator with adjustable DC voltage
• Provides a supply for external circuits
• Symmetrical high impedance inputs (64 kW) for dynamic, magnetic or piezo-
electric microphones
• Asymmetrical high impedance input (32 kW) for electrets microphones
• DTMF input with confidence tone
• MUTE input for pulse or DTMF dialing
• Receiving amplifier for dynamic, magnetic or piezo-electric earpieces
• AGC line loss compensation for microphone and earpiece amplifiers.
• Line powered telephone sets, cordless telephones, fax machines, answering
machines.
BLOCK DIAGRAM:
BL1001
http://www.belling.com.cn
-1-
Total 8 Pages
8/10/2006
Wrote by 2006
TYPICAL CHARACTERISTICS:
BL1110A
Fig.1 Main voltages versus Line current
Fig.2 Voltage gain from MIC to LN
http://www.belling.com.cn
-6-
Total 8 Pages
8/10/2006
Wrote by 2006
6 Page | ||
Seiten | Gesamt 8 Seiten | |
PDF Download | [ BL1110A Schematic.PDF ] |
Teilenummer | Beschreibung | Hersteller |
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