Output amplifier structure with bias compensation

Details Output amplifier structure with bias compensation Output amplifier structure with bias compensation

2007-10-09

2007-10-09

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Integrated circuits

Reexamination Certificate

active

11282021

ABSTRACT:
In one embodiment, an output transistor and a bias compensation device are placed in proximity to each other on the same package substrate. The bias compensation device is electrically isolated but thermally coupled to the output transistor, and is configured to provide a output signal for adjusting bias to the output transistor.

REFERENCES:
patent: 4523243 (1985-06-01), Billington
patent: 5796165 (1998-08-01), Yoshikawa et al.
patent: 6301122 (2001-10-01), Ishikawa et al.
Application Note “AND8196/D ThermalTrak Audio Output Transistors”, Jan. 2005—Rev. O, Semiconductor Components Industries, LLC, 2005.
EETIMES, “ON Semi's Output audio transistor eliminate thermal lag and bias in high-fidelity amps”, by Bettyann Liotta, eeProduct Center, Jan. 6, 2005.
Product Brochure, “Electronic Polymers for Semiconductor Packaging”, STAYSTIK Thermoplastic Adhesives, STAYDRY Getter Materials, STAYCHIP Underfills, POLYSOLDER Conductive Adhesives, Cookson Electronics (undated).
Planet Analog “to bias or not bias: New audio output transistors make that decision easy”, by Mark Busier, Product Applications Engineer, On Semiconductor, Phoenix, Jan. 10, 2005.
On Semiconductor website, Press Room, Product News, “ON Semiconductor's ThermalTrak Devices Eliminate Thermal Lag and Bias Trimming in the Audio Output of High Fidelity Amplifiers”, International Consumer Electronics Showcase (CES)—Las Vegas, Nevada—Jan. 6, 2005.

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