LA1193M(1997) データシートの表示（PDF） - SANYO -> Panasonic

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LA1193M
(Rev.:1997)

High-Performance FM Front End for Car Radios

SANYO -> Panasonic 

LA1193M, 1193V

4. Mixer

The mixer circuit used in this IC is a balanced input/balanced output double balance mixer circuit.

• Input Format

Emitter input

Input impedance: 25 Ω

Optimization of the component geometry, emitter

current and bias allow this circuit to achieve the

following performance.

Mixer input usable sensitivity: 15 dBµ

Mixer input IMQS*: 90.5 dBµ

Note: * Mixer input IMQS is defined as follows:

Figure 4 Mixer Circuit

(Improved by 6.0 dBµ over previous products.)

fr = 98.8 MHz, no input

fu1 = 98.8 MHz, 1 kHz, 30% modulation

fu2 = 99.6 MHz, no modulation

5. IF Amplifier

IMQS is the interference 1 and 2 input levels such that when an

interference signal with the same level is input to the mixer and

distortion occurs at the mixer, the generated IM output has a S/N

ratio of 30 dB.

This IF amplifier is a single stage differential amplifier.

Specifications

Input impedance: 330 Ω

Output impedance: 330 Ω

Gain:

25 dB

Gain adjustment can be provided using either of

the methods shown.

IF Gain adj

Temperature Characteristics

The LA1193M/V uses Vref temperature characteristics correction to hold the gain temperature characteristics to the

low level of about 1 dB over the range –30 to +80°C.

No. 4715-11/21

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