MC13030 データシートの表示（PDF） - Motorola => Freescale
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MC13030 Datasheet PDF : 16 Pages
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MC13030
Figure 1. Test Circuit
8.0 V
Mixer1 Out
Mixer2 Out
47
1:4
47
1:4
IF
Adj to 11.7 MHz
Input
2.2 µH
Mixer2 In
Osc Out
82 pF
0.1
0.01
1.0 µF
0.1
+
47
10.245
0.1
22
0.1 10 k 180 pF
28 27 26 25 24 23 22 21 20 19 18 17 16 15
VCO VCO VCO Mix1 Mix1 RF Mix2 Mix2 Mix2 Xtal Xtal IF In Det Det
Out
Ref Out Out Vref In Out Out Osc E Osc B
Vref In
680 µH
IF Output/
Det Input
Mixer1 Input
FO = 1.0 MHz
FET
RF Mix1
Mix1 Mix1 RF RF RF AGC RF AGC SD IF SD IF S Level IF AF
In In Gnd AGC AGC2 Adj Adj Level Gnd Out Out AGC In Out VCC
1
2
3
4
5
6
7
8
9 10 11 12 13 14
0.1
0.1
R7
FET RF AGC Voltage
RF AGC Current
Pin 6 Current
10 k 10 k
+
+
4.7 µF
8.0 V
+
0.1
47 µF
Audio Out
SD Adjust
S Output Current
IF Signal Out
NOTES: 1. The transformers used for at the output of the mixers are wideband 1:4 impedance ratio. The secondary load is the 50 Ω input of the spectrum
analyzer, so the impedance across the collectors of the mixer output is 200 Ω.
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 kΩ 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.
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.
MOTOROLA ANALOG IC DEVICE DATA
3
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