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| DESCRIPTION: Model 990RETRO Discrete Operational Amplifier. This listing is for quantity of one unit. If you need more than one, we can provide a quantity discount. The 990RETRO plastic housing is 1.125" x 1.125" square and 0.75" tall. The Model 990RETRO is a high performance discrete operational amplifier designed for professional audio application areas where ultra-low noise, low distortion and highly linear operation is required. The all-discrete design is similar to the Sonic Imagery Labs 990Enh-Ticha basic topology but the input differential super-matched transistor pair has been replaced with a NOS LM394. Like the modern 990Enh-Ticha, the 990RETRO uses precision temperature stable power supply independent current sources. Supply independent current sources allow the bias to remain locked at the optimum operating point regardless of power supply voltage. Dual matched pair temperature stable current mirrors, dual matched pair active current loads give the Model 990RETRO it's outstanding power supply rejection performance. The enhanced low distortion Class-A output driver stage can sink or source 250mA allowing this module to drive transformers easily. Integrated power transistor heatsinks coupled to high grade thermal epoxy and plastic enclosure keeps the 990RETO operating within a wide SOA and does not suffer from Beta droop when driving heavy iron or heavy loads. Each amplifier is fully tested and meets or exceeds published specifications. Specifications and Datasheets at: sonicimagerylabs.com Supply independent current sources allow the bias to remain locked at the optimum operating point regardless of supply voltage. Dual matched pair temperature stable current mirrors, dual matched pair active current loads give the Model 990RETRO it's outstanding power supply rejection performance. The enhanced low distortion Class-A output driver stage can sink or source 250mA allowing this module to drive transformers easily. Integrated power transistor heatsinks coupled to themal epoxy keeps the 990RETRO operating within a wide SOA and does not suffer from Beta droop when driving heavy iron or heavy loads. Each amplifier is fully tested and meets or exceeds published specifications. Because of the 990RETRO's high current drive capability, supporting circuitry impedances can be scaled down within the application circuit. This can reduce the overall system noise, without increased distortion and provides higher headroom compliance performance. See Also |
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CONDITIONS OF SALE: Table 1. Compatible Upgrade Table |