UTCMC34018 查看數據表（PDF） - Unisonic Technologies

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UTCMC34018

VOICE SWITCHED SPEAKER-PHONE CIRCUIT

Unisonic Technologies 

UTCMC34018 LINEAR INTEGRATED CIRCUIT

Fig 6 Attenuator Gain vs Vacf

+10

0

GTX

-10

-20

GRX

-30

-40

0

RR=30k ohms

RTX=91k ohms

RRX=18k ohms

20

40

60

80

100 120 140 160

Vacf(mV)

150

120

90

60

30

0

0

Fig 8 Log Amp Transfer Characteristics

R=2700 ohms

C=0.1 µF

R=4700 ohms

C=0.068 µF

R=4700 ohms

C=0.068 µF

(RLI,TLI)

Input Votage C R

(@ 1.0kHz)

VB

(RLO,TLO)

20

40

60

80

Input Voltage(mVp-p)

Fig 7 Log Amp Transfer Characteristics

250

200

150

100

50

0

0

Input

Current

(RLI,TLI,XDI)

VB

Output

Voltage

(RLO,TLO,CP2)

-20

-40

-60

-80

DC Input Current( µA)

Fig 9 Speaker Amp Output vs Supply Voltage

10.0

8.0

No load

6.0

25 ohms load

4.0

2.0

0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0 10.0 11.0

V+(Volts)

Input Signal

(@ MCI)

Fig 11 Transmit Detector operation

CP2(pin 12)

V1=200mV

Solid line=CP1(pin11)

Dotted line=Voninverting

Input of transmit detectot

Comparator

2.7 x V1

Slope=0.5V/sec

36mV

XDC(pin 23)

4 Volts

UTC

UNISONIC TECHNOLOGIES CO., LTD. 12

QW-R108-006,A

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