Patent ID: 7003468
Filing Date: 2006-02-21
Classification: H03G

Abstract:
1. An envelope generator, comprising: an input terminal for having a signal inputted therein; a first integrator for generating intermediate state of envelopes with a first attack time and a first release time in response to changes in level of said signal inputted through said input terminal to impart said intermediate state of envelopes to said signal; a second integrator for respectively modifying said intermediate state of envelopes into final state of envelopes with a second attack time and a second release time in response to changes in level of said signal outputted from said first integrator to impart said final state of envelopes to said signal; a time constant distributor for receiving a desired release coefficient to distribute a first release coefficient to said first integrator and a second release coefficient to said second integrator, said first release coefficient corresponding to said first releasing time of said first integrator, said second release coefficient corresponding to said second releasing time of said second integrator; and an output terminal for outputting said signal with said final state of envelopes therethrough, wherein said first attack time is equal to zero, said second attack time corresponds to a desired attack coefficient, and the sum of said first release coefficient to be distributed to said first integrator and said second release coefficient to be distributed to said second integrator is equal to said desired release coefficient.