U4313B View Datasheet(PDF) - Temic Semiconductors

Part Name

Description

Manufacturer

U4313B

Low-Current Superhet Remote Control Receiver

Temic Semiconductors 

TELEFUNKEN Semiconductors

U4313B

Low-Current Superhet Remote Control Receiver

Description

The U4313B is a monolithic integrated circuit in bipolar

technology for low-current UHF remote control super-

heterodyne receivers in amplitude- or frequency-

modulated mode. Typical applications are keyless car

lock-, alarm or telecontrol remote indication systems.

Especially for automotive applications it supports a

superhet design with less than 1 mA total current

consumption, as required by the car manufacturers.

Features

D Usable for amplitude- and frequency-modulated

transmission systems

D Extremely low quiescent current approximately 1 mA

in the stand-by mode due to wake-up concept

D Wide power supply voltage range 3 to 13 V

D Sensitive IF-amplifier for 10.7 MHz operating

frequency

D Logarithmic AM demodulator

D FM demodulator

D Monoflop exit to wake up a microcontroller

D High performance operational amplifier to realize

a data recovering filter

D Inverting clamping comparator with amplitude-

depending hysteresis for data regeneration

Block Diagram

Wake up out

VS

VRef = 2.4V 13

Bandgap

11

Internal

VRef = 2.4 V

10

3

Monoflop

RF

Level

Wake up

7

6

Inveting

clamping

comparator

5 Data out

10.7 MHz

9

4

IF

amplifier

Quadrature

detector

Operational

2

amplifier

8

12

log AM out

–

14

16

FM out

+

1

95 10213

10.7 MHz

Figure 1. Block diagram

Data

filter

Rev. A1: 23.06.1995

1 (14)

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