M64884FP Просмотр технического описания (PDF) - MITSUBISHI ELECTRIC

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M64884FP

Transistor for VCO,1st IF MIX,2-multiple circuit built-in 500MHz/1GHz Dual PLL Synthesizer

MITSUBISHI ELECTRIC  

MITSUBISHI ICs (Cordless Telephone)

M64884FP

Transistor for VCO,1st IF MIX,2-multiple circuit built-in 500MHz/1GHz Dual PLL Synthesizer

6. X'tal OSCILLATION CIRCUIT

Connection of oscillation block.

Built-in buf f er transistor f or oscillation enables direct oscillation at X'tal.

Connections of X'tal and TCXO are shown below.(recommended circuit)

When X'tal is in use

When TCXO is in use

X'tal

XIN

XIN

TCXO

1000p

XOU T

XOU T

OPEN

C : CH ty pe

7. Connection of Buffer Block

As the 2nd mixer local oscillator, the buf f er output pin(XBO) is set to share X'tal. The pin is av ailable as

f ollows.

When the pin is shared

When the pin is not shared

2nd MIX

XBO

1000p

1000p

XBO

8. Negative Resister Evaluation Circuit

Negativ e resistor in the oscillation circuit are measured with the conditions and coef f icients shown in drawing

below.

XIN

XOU T

Ver 1.0

Nov 25,1998

R

C1

C2

X'tal

X'tal : 21.25MHz(TEW CORP CI = 20ohm)

C1 : 18 pF

C2 : 36 pF

C3

C3 : 100 pF

C4 : 36 pF

Cv : ~30 pF

C4

Cv VCC : 3V

Ta : 25oC

C : CH ty pe

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