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參數(shù)資料
| 型號(hào)： | TDA1001BT |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | Interference and noise suppression circuit for FM receivers |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO16 |
| 封裝： | PLASTIC, SOT-109A, SOP-16 |
| 文件頁(yè)數(shù)： | 8/13頁(yè) |
| 文件大?。?/td> | 108K |
| 代理商： | TDA1001BT |
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December 1982
8
Philips Semiconductors
Product specification
Interference and noise suppression circuit
for FM receivers
TDA1001B
TDA1001BT
Notes to application information
1.
The interference suppression and noise feedback control thresholds can be determined by R13 or a capacitive
voltage divider at the input of the high-pass filter and they are defined by the following formulae:
V
i(tr)
= (1
+
R13/R
S
)
×
V
i(tr)O
in which R
S
= 2 k
;
V
ni
= (1
+
R13/R
S
)
×
V
niO
in which R
S
= 2 k
.
2.
The suppression pulse duration is determined by C11 = 2,2 nF and R11 = 6,8 k
.
3.
The characteristic of the noise feedback control is determined by R12 (and R10).
4.
The feedback control of the interference suppression threshold at higher repetition frequencies is determined by R10
(and R12).
5.
The 19 kHz generator can be adjusted with R
7-16
(and R
7-8
). Adjustment is not required if components with small
tolerances are used e.g.
R < 1% and
C < 2%.
6.
Measuring conditions:
The peak output noise voltage (V
no m
, CCITT filter) shall be measured at the output with a de-emphazing time T = 50
μ
s (R = 5 k
, C = 10 nF); the reference value of 0 dB is V
o int
with the 19 kHz generator short-circuited (pin 7
grounded).
Noise threshold feedback control
(notes 1 and 3)
Noise input voltage (r.m.s. value) f = 120 kHz
sinewave for V
12-9
= 300 mV
at R13 = 0
at R13 = 2,7 k
for V
12-9
= 425 mV (V
i(tr)O
+ 3 dB)
at R13 = 0
at R13 = 2,7 k
for V
12-9
= 560 mV (V
i(tr)O
+ 20 dB)
at R13 = 0
at R13 = 2,7 k
Amplification control voltage by interference intensity
(note 4)
V
i(rms)
= 50 mV; f = 19 kHz;
V
i(tr)M
= 300 mV; r.m.s. value
at repetition frequency f
r
= 1 kHz
at repetition frequency f
r
= 16 kHz
V
ni(rms)
V
ni(rms)
2,3
3,3
8,2
4,3
mV
mV
V
ni(rms)
V
ni(rms)
7,3
16,5
mV
mV
V
ni(rms)
V
ni(rms)
33
45
107
57
mV
mV
V
o6(rms)
V
o6(rms)
49
45
56
65
mV
mV
PARAMETER
SYMBOL
MIN.
TYP.
MAX.
UNIT
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