Title: Device for generating function of approximate n-th degree and temperature compensation quartz oscillation circuit
Application Number: 03813927 Application Date: 2003.08.27
Publication Number: 1663111 Publication Date: 2005.08.31
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03B5/32,G06G7/20
Applicant(s) Name: Asahi Chemical Micro Syst Address:
Inventor(s) Name: Kawasaki Takako
Attorney & Agent: yang xiaoguang li zheng
Abstract:
     A circuit for generating a component of n-th order includes: six differential amplifiers ( 15 A to 15 F) having a pair of input terminals supplied with a common linear input signal and a constant level signal of a predetermined level, outputting a reversed or non-reversed signal to the linear input signal, and having a limiter function to limit the output signal to a predetermined maximum value and a minimum value; a constant level signal generation circuit for supplying the constant level signal to each of the six differential amplifiers; a current mirror circuit ( 14 ) for controlling current flowing in the differential amplifiers ( 15 A to 15 F); and addition resistors ( 16 A, 16 B) for adding the output current of the differential amplifiers ( 15 A to 15 F). By increasing the flowing current by the sixth differential amplifier ( 15 F) so as to increase the resistance value, it is possible to obtain a highly accurate output current of a component of a 5-th order function having more precipitous inclination with respect to the input signal.
Time: 5