Jong K Kim
Barber at Chapman Dr, Colorado Springs, CO
License number
Colorado 5399
Issued Date
Jul 29, 1998
Renew Date
Apr 1, 2016
Expiration Date
Mar 31, 2018
Type
Barber
Address
Address
834 Chapman Dr APT 8, Colorado Springs, CO 80916
Professional information
Exponential Transconductance Amplifier
US Patent:
6650182, Nov 18, 2003
Filed:
Dec 14, 2001
Appl. No.:
10/016962
Inventors:
Jong K. Kim - Colorado Springs CO
Elangovan Nainar - Longmont CO
Michael P. Straub - Longmont CO
Elangovan Nainar - Longmont CO
Michael P. Straub - Longmont CO
Assignee:
Agere Systems Inc. - Allentown PA
International Classification:
H03F 345
US Classification:
330252, 330256
Abstract:
A non-linear transconductance amplifier includes a differential input stage and a non-linear transconductance stage operatively coupled to the differential input stage. The differential input stage includes first and second inputs forming a non-inverting input and an inverting input, respectively, of the amplifier for receiving an input differential signal. The non-linear transconductance stage generates an output of the amplifier having a linear transconductance that is substantially zero when the input differential signal is within a predetermined range and a non-linear large transconductance when the input differential signal is outside the predetermined range. The amplifier provides improved response time to widely varying load conditions while possessing a low loop bandwidth. A threshold region where the output of the amplifier is substantially zero can be operatively adjusted and tightly controlled. Furthermore, the amplifier accomplishes these advantages without employing timing circuitry and without the necessary overhead and/or noise often associated with such timing circuitry.