| No. |
Part Name |
Description |
Manufacturer |
| 1 |
B308D |
Unregulated microphone amplifier for piezo microphones, possibly equivalent TAA970 |
RFT |
| 2 |
B318D |
Regulated microphone amplifier for piezo speech capsules |
RFT |
| 3 |
LM4834 |
1.75W Audio Power Amplifier with DC Volume Control and Microphone Preamp |
National Semiconductor |
| 4 |
LM4834MS |
Boomer 1.75W Audio Power Amplifier with DC Volume Control and Microphone Preamp |
National Semiconductor |
| 5 |
LM4834MSX |
Boomer 1.75W Audio Power Amplifier with DC Volume Control and Microphone Preamp |
National Semiconductor |
| 6 |
PGA2500 |
Digitally Controlled Microphone Preamplifier |
Burr Brown |
| 7 |
PGA2500IDB |
Digitally Controlled Microphone Preamplifier |
Burr Brown |
| 8 |
PGA2500IDBR |
Digitally Controlled Microphone Preamplifier |
Burr Brown |
| | | |
