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TK15322 Datasheet(PDF) 4 Page - TOKO, Inc |
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TK15322 Datasheet(HTML) 4 Page - TOKO, Inc |
4 / 12 page Page 4 June 1999 TOKO, Inc. TK15322 TEST CIRCUITS AND METHODS (CONT.) VCC Cont. + + ~ Figure 2 VCC + Figure 3 VCC Cont. + + Figure 4 TOTAL HARMONIC DISTORTION (FIGURE 4) Use the lower distortion oscillator for this measurement because distortion of the TK15322 is very low. 1) Pin 5 is in the open condition, or low level. 2) Connect a distortion analyzer to Pin 3. 3) Input the sine wave (1 kHz, 1 Vrms) to Pin 4. 4) Measure the distortion of Pin 3. This value is the distortion of 1-Ach. 5) Next connect Pin 5 to the V CC, or high level. 6) Input the same sine wave to Pin 2. 7) Measure in the same way. This value is the distortion of 1-Bch. VOLTAGE GAIN (FIGURE 5) This is the output level against input level. 1) Pin 5 is in the open condition, or low level. 2) Connect AC volt meters to Pin 4 and Pin 3. (Using the same type meter is best) 3) Input a sine wave (f = max. 20 kHz, 1 Vrms) to Pin 4. 4) Measure the level of Pin 4 and name this V1. 5) Measure the level of Pin 3 and name this V2. 6) Calculate Gain = 20 Log (( |V2 - V1| )/V1) V1<V2 + Gain, V1>V2 - Gain This value is the voltage gain of 1-Ach. 7) Next, connect Pin 5 to the V CC, or high level. 8) Input the same sine wave to Pin 2. 9) Measure and calculate in the same way. This value is the voltage gain of 1-Bch. CONTROL INPUT IMPEDANCE (FIGURE 3) This is the input resistance of control terminal. 1) Measure the inflow current from V CC to Pin 5. 2) Calculate: IMP = V CC / Inflow Current This resistance is the input impedance. |
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