參數(shù)資料
型號： MC13030DW
廠商： MOTOROLA INC
元件分類： 接收器
英文描述： DUAL CONVERSION AM RECEIVER
中文描述： AM, AUDIO SINGLE CHIP RECEIVER, PDSO28
封裝： PLASTIC, SOIC-28
文件頁數(shù)： 3/16頁
文件大?。?/td> 386K
代理商： MC13030DW
MC13030
3
MOTOROLA ANALOG IC DEVICE DATA
NOTES:
1.The transformers used for at the output of the mixers are wideband 1:4 impedance ratio. The secondary load is the 50
input of the spectrum
analyzer, so the impedance across the collectors of the mixer output is 200
.
2.Since the VCO frequency is not critical for this measurement, a fixed tuned oscillator tuned to 11.7 MHz is used. This gives an input frequency
of 1.0 MHz.
3.The detector coil is loaded with a 10 k resistor to reduce the tuned circuit Q and to present a 10 k
load to the IF output for determination of IF
transconductance.
4.The RF AGC current, S output current and Pin 6 current are measured by connecting a current measuring meter to these pins, so they are effectively
shorted to ground.
5.SD adjust is adjusted by connecting a power supply or potentiometer and voltmeter to Pin 8.
Figure 1. Test Circuit
15
16
17
18
19
20
21
22
23
24
25
26
27
28
VCO
Out
VCO
VCO
Ref
Mix1
Out
Mix1
Out
RF
Vref
Mix2
In
Mix2
Out
Mix2
Out
Xtal
Osc E
Xtal
Osc B
IF In
Det
Vref
Det
In
Mix1
In
Mix1
In
RF
Gnd
FET
RF
AGC
RF
AGC2
RF
AGC
Adj
Mix1
RF AGC
Adj
SD
Level
IF
Gnd
SD IF
Out
S Level
Out
IF
AGC In
AF
Out
VCC
14
Mixer1 Out
Mixer2 Out
8.0 V
Mixer2 In
Osc Out
Mixer1 Input
FO = 1.0 MHz
FET RF AGC Voltage
RF AGC Current
Pin 6 Current
SD Adjust
IF Signal Out
S Output Current
Audio Out
IF Output/
Det Input
IF
Input
Adj to 11.7 MHz
2.2
μ
H
82 pF
680
μ
H
47
μ
F
8.0 V
10 k
10 k
+
+
22
0.1
0.1
10.245
47
0.1
1.0
μ
F
+
0.1
0.01
47
47
1:4
1:4
10 k
180 pF
0.1
0.1
R7
0.1
4.7
μ
F
+
13
12
11
10
9
8
7
6
5
4
3
2
1
FUNCTIONAL DESCRIPTION
The MC13030 contains all the necessary active circuits for
an AM car radio or shortwave receiver.
The first mixer is a multiplier with emitter resistors in the
lower, signal input transistors to give a high dynamic range. It
is internally connected to the first oscillator (VCO). The input
pins are 1 and 2. The input can be to either Pins 1 or 2, or
balanced. These pins are internally biased, so a dc path
between them is allowable but not necessary. The mixer
outputs are open collectors on Pins 25 and 26. They are
normally connected to a tuned transformer.
The first oscillator on Pin 27 is a negative resistance type
with automatic level control. The level is low so the signal
does not modulate the tuning diode capacitance and cause
distortion. Pin 26 is the reference voltage for the oscillator
coil. This reference is also the supply for the mixer circuits.
The upper bases of the mixer are 0.7 V below this reference.
The second mixer is similar to the first, but it is single–
ended input on Pin 22. Its outputs are open collectors on
Pins 20 and 21 which are connected to a tuned transformer.
The dynamic range of this mixer is less than the first. It is also
connected internally to an oscillator which is normally crystal
controlled. The oscillator is a standard Colpitts type with the
emitter on Pin 19 and the base on Pin 18.
The IF amplifier input is Pin 17. The AGC operates on the
input stage to obtain maximum dynamic range and minimum
distortion. The IF output, Pin 15, is a current source.
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