The U4459B is an integrated bipolar circuit suitable for the IF processing in cable-DVB receiver (DVB = Digital Video Broadcasting) and cable network application. The circuit contains a wideband IF amplifier, mixer stage, gain control for the IF amplifier and a tuner-AGC (Automatic Gain Control) with adjustable take over point for an additional external prea.
D Input frequency range 30 to 50 MHz (1st IF) D Wideband IF amplifier with high linearity D Gain control of the IF amplifier by external dc voltage D Mixer stage with local oscillator input (symmetrical or unsymmetrical) D High output level of mixed signal (2nd IF) (up to 2.4 V, peak-to-peak value) D Tuner-AGC with adjustable take over point for a preamplifier D Supply voltage range 6.8 to 13.5 V Package: DIP16 LO in 8 IF1 in 1 IF amp LO in 9 95 9636 6 16 IF1 in Mixer IF2 out IF gain control 3 ITun Bandgap 14 VS 2 VTun 5 VGain 13 BG 4,15 GND Figure 1. Block diagram TELEFUNKEN S.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | U4454B |
TEMIC Semiconductors |
Quasi-Split-Sound Processing and AM-Demodulator | |
2 | U440 |
Calogic LLC |
N-Channel JFET Monolithic Dual | |
3 | U440 |
Micross |
Low Leakage | |
4 | U440 |
Siliconix |
dual n-channel JFET | |
5 | U441 |
Calogic LLC |
N-Channel JFET Monolithic Dual | |
6 | U441 |
Micross |
Low Leakage | |
7 | U441 |
Siliconix |
dual n-channel JFET | |
8 | U443 |
Siliconix |
N-Channel JFET Pairs | |
9 | U443 |
Calogic LLC |
N-Channel JFET Monolithic Dual | |
10 | U444 |
Siliconix |
N-Channel JFET Pairs | |
11 | U444 |
Calogic LLC |
N-Channel JFET Monolithic Dual | |
12 | U4468B |
ATMEL Corporation |
Quasi-split Sound Circuit and AM Demodulator IC |