TCA440 Datasheet, PDF (9/11 Pages) Siemens Semiconductor Group – AM Receiver Circuit

80
TCA 440 / T
S+N
N
=
f
(P_gmax)
V_CC = 9 V
60
f_i = 1 MHz
f_m = 1 kHz; m = 0.3
R_g = parameter
50
40
1 kΩ
30 Ω
4.7 kΩ
250 Ω
30
20
P_gmax=
V^2go
4Rg
10
500
TCA 440 / T
V₁₀ = f ( V_iIF )
5V
9V
V_CC = parameter
f_IF = 455 kHz
400 _{m = 0.8; fm = 1 kHz}
300
200
100
0
10 ^-9 10 ^-7
10 ^-5
10- ³ 10 ^-1 10 ⁰ 10 ¹
P_gmax(µW)
0
10 ¹ 10 ² 10 ³ 10 ⁴ _ViIF(µV) 10 ⁶
800
TCA 440 / T
∆HFgain = f ( V₃ )
V_CC = parameter
V₁₅ = 50 mV const.
600
f_iHF = 1 MHz
5V
9V
800
TCA 440 / T
∆IFgain = f ( V₉ )
V_CC = parameter
V_AF = 200 mV const.
600
f_iIF = 455 kHz
f_m = 1 kHz; m = 0.8
5V _9V
400
400
200
200
0
0
10
20
30
40
50
∆HFgain (dB)
12/95
TCA 440 / T
0
0 10 20 30 40 50 60
∆IFgain (dB)
9