TK14551V Ver la hoja de datos (PDF) - Toko America Inc

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TK14551V

FM IF DETECTOR/AMPLIFIER

Toko America Inc  

TK14551V

TEST CIRCUIT (CONT.)

Measurement of Battery Save Function:

Battery Save ON: SW1 = 0.2 V position

Battery Save OFF: SW1 = 2 V position

Measurement of Comparator:

SW3 is closed only for the measurement of the RSSI comparator response characteristics and output sink

current, supplying 1 V to Pin 19.

DC

PG1 is connected only for the measurement of the RSSI comparator response. Input the pulse wave to Pin 20,

and measure the output wave (VD) of Pin 16.

ISINK1 (RSSI Comparator Output Current):

No IF input. SW2 = V3 position (supplying 0.9 V to Pin 20). SW3 = ON (supplying 1 V to Pin

19). SW5 = V6 position (supplying 3 V to Pin16). Measure the DC current to Pin 16 from

V6.

ISINK2 (Data Comparator Output Current):

SW9 = V9 position(supplying 1 V Pin 11). SW10 = V10 position (supplying 0.9 V to Pin 12).

SW6 = V7 position (supplying 3 V to Pin 13). Measure the DC current to Pin 13 from V7.

Measurement of T , T , t (RSSI Comparator, Data Comparator):

R F PD

RSSI Comparator: No IF input. SW2 = PG1 position. SW3 = ON (supplying 1 V to Pin 19). SW5 = VD position.

Measure the output wave (VD).

Data Comparator: SW9 = 3 kΩ position. SW10 = 3 kΩ position. SW6 = VE position. Measure the output wave

(VE).

T , T : Measure the time between the 10% point and the 90% point of the output wave.

RF

tPD: Measure the time between the 50% point of the input wave and the 50% point of the output wave.

Measurement of the Logarithmic Detection of RSSI Output:

SW7 = OFF. SW8 = VB position. Input AM modulation signal SG1(fIN = 40 MHz, fm = 2 MHz, mod. = 80%, VIN

= -60, -40, -15 dBm) to Pin 24. Measure the logarithmic detection output voltage of Pin 10.

The AM demodulating output voltage deflection is standardizing the AM demodulating output voltage in the case

of -40 dBm input, and calculated by the deflection by AM demodulating output voltage in the case of -60, -15

dBm input.

The measurement of demodulating frequency band is standardizing the AM demodulating output voltage of Pin

10 in the case that V = -40 dBm, f = 40 MHz, fm = 100 kHz and 80% AM modulating output voltage at Pin 10,

IN

IN

comparing it to the standard output voltage.

Measurement of Output Current of RSSI Buffer Amplifier 2:

SW7 = OFF. SW8 = V8 position. No IF input. SW4 = ON (supplying 1 V to Pin 18). Measure the DC current

(A4) between V8 and Pin 10 in the case of V8 = 3 V, 0 V.

Measurement of Output Impedance of RSSI Buffer Amplifier 2:

No IF input. SW8 = VB position. SW4 = ON (supplying 1 V to Pin 18). At first, SW7 = OFF and measure the

DC current (VB1) of Pin 10. Next, SW7 = ON and measure the DC current (VB8) of Pin 10. The output impedance

(Z ) is calculated by the following:

OUT

ZOUT (Ω) = 10 k • ((VB1 - VB2)/(VB2 - 0.5))

Page 6

January 2000 TOKO, Inc.

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