MC13030 Просмотр технического описания (PDF) - Motorola => Freescale

Номер в каталоге

Компоненты Описание

производитель

MC13030

Dual Conversion AM Receiver

Motorola => Freescale 

Pin No.

10

11

12

13

14

15

16

MC13030

PIN FUNCTION DESCRIPTION (continued)

Internal Equivalent Circuit

Description

Station Detector IF Output

10 k

This output is “on” when V11 > V8. The output is an amplified and limited

2nd IF signal. The signal level is ≈ 250 mVpp when it is 100% “on”.

10

IF

SD

510

VCC

1.0 k

S Level Output

This is a dc current proportional to IF input level. With a load resistor of

75 k, the dc voltage is 0 to 5.1 V.

510

11

1.0 k

12

1.0 k

VCC

IF AGC In

The IF gain is controlled by the dc voltage on this pin. It is normally

connected to Pin 13 through an RC network to filter out the audio signal

on Pin 13. The IF gain is maximum when V13 ≈ 3.6 V. When V13

increases, the IF gain decreases.

VCC

100

13

Audio Output

The dc voltage on Pin 13 is ≈ 3.6 V with no input signal and increases to

≈ 4.5 V at minimum IF gain. A nonpolarized electrolytic capacitor may be

required to couple to the audio circuits if the audio amplifier dc bias

voltage is between these voltages.

14

VCC

510

15

510

510

1.0 k

16

510

Supply Voltage

The nominal operating voltage is 8.0 V.

IF Amplifier Output and Detector Input

The detector coil must be connected between Pin 15 and 16. The IF

amplifier output is a current source, the IF amplifier is a transconductance

amplifier; the gain is determined by the impedance between Pins 15 and

16. The IF amplifier gm ≈ 0.028 mho. If a wide bandwidth IF is desired, the

detector coil can be connected between Pins 15 and 16 without a tap and

then loaded with a resistor across the coil.

Detector Reference Voltage

One side of the detector coil is connected to this pin. It should be

bypassed with a 0.1 µF capacitor.

MOTOROLA ANALOG IC DEVICE DATA

7

Share Link: