The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 1998
Filed:
Sep. 19, 1996
Madhav V Kolluri, Sunnyvale, CA (US);
Maxim Integrated Products, Inc., Sunnyvale, CA (US);
Abstract
Three state high speed amplifiers having a high output impedance when disabled and a minimum glitch when enabled and disabled. The amplifiers utilize complementary emitter followers for the output stage. When the amplifiers are disabled, circuitry provided for the purpose drives is responsive to the voltage on the output of the amplifier to maintain the base-emitter voltages of the output emitter followers at a substantially constant level below the turn-on voltages of the transistors, such as substantially zero volts. When the amplifier is enabled, the circuitry is also responsive to the voltage on the output of the amplifier, but this time to allow the base-emitter voltages of the output emitter followers to at least freely rise to the turn-on voltages of the transistors. Thus the reverse base-emitter voltage of the output transistors when the circuit is disabled is limited, and the output glitch on enable and disable is minimal because of the limited base-emitter voltage swing of the output transistors between disable and enable.