TK15121MTL/121 データシートの表示（PDF） - Toko America Inc
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TK15121MTL/121 Datasheet PDF : 8 Pages
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TEST CIRCUIT AND METHODS
3 KΩ
A1
SG
THD V_
V~
TK15121
V1
3 KΩ
SG
THD V_
V
~
A2
V2
METHODS
1) Power supply current.
· Power supply current in the ‘MUTE OFF’.
When the control is ‘Lo (or open)’, measures the current ‘A1’.
· Power supply current in the ‘MUTE ON’.
When the control is’HI’, measures the current ‘A1’.
2) Attenuation volume.
· When the control is ‘Hi’, attenuation is calculated by the following formula.
( ) Pin 1(Pin 3) AC voltage at V1 = 3 V
ATT = 20Log
Pin 1(Pin 3) AC voltage at V1 = 0 V
3) Current of the charge and discharge to the Condenser Pin.
· Current of the charge.
When the control is ‘Hi’ and the measurement is outflow current ‘A2’ when the Pin 4 voltage is 0.3 V.
· Current of the discharge.
When the control is ‘Lo (or open)’ and the measurement is inflow current ‘A2’ when the Pin 4 voltage is 0.3 V.
4) Voltage of the control switch.
· Voltage for the control ‘Hi’.
The first elevates Pin 2 voltage gradually from 0 V and if its action becomes ‘MUTE ON’ at the Pin 1 (Pin 3) output,
t hen measures the voltage ‘V1’.
· Voltage for the control ‘Lo’.
The first lowers Pin 2 voltage gradually from VCC, and if its action becomes ‘MUTE OFF’ at the Pin 1 (Pin 3)
output, then measures the voltage ‘V1’.
5) Output DC voltage at the ‘MUTE ON’.
When the control is ‘Hi’, measures the Pin 1 (Pin 3) output voltage at non-input.
6) Total harmonic distortion.
When the control is ‘Lo (or open)’, measures the distortion of the Pin 1 (Pin 3) output.
7) Signal Voltage Gain
When the control is ‘Lo (or open)’, signal gain is calculated by the following formula.
( ) GV = 20Log
Pin 1(Pin 3) AC voltage
Pin 1(Pin 3) AC voltage front 3K
8) Maximum input signal voltage.
When the control is ‘Lo (or open)’, the first elevates input AC voltage of Pin 1 (Pin 3) gradually from 0 VP-P, and
if the distortion became 0.01 % at the Pin 1 (Pin 3) output, the measure the AC voltage.
April 1999 TOKO, Inc.
Page 3
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