Title: Sinusoidal reference circuit
Application Number: 200610033188 Application Date: 2006.01.23
Publication Number: 1805269 Publication Date: 2006.07.19
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03B5/26
Applicant(s) Name: Emerson Network Power Co., Ltd. Address: 518057
Inventor(s) Name: Bai Dan
Attorney & Agent: yuan shilin
Abstract:
     The invention relates to a sine reference circuit, whose output voltage and the frequency are adjustable, which can be used in bell current module. The invention comprises: an error adjuster, a Wien-Bidge, and detecting circuit. Wherein, said detecting circuit detects the output signal of Wien-Bridge to be feed back to the input of error adjuster; the error adjuster compares the reference signal and said output signal to attain a error signal; the Wien-Bridge according to said error signal to adjust the output signal; the resistance valve of RC network in said Wien-Bridge can be adjusted; said detecting circuit comprises a full-wave rectification circuit. The invention has the function to adjust frequency and can solve the problem of voltage change caused by adjusting frequency, therefore, it can make the frequency and amplitude of output signal adjusted independently.
Time: 9
<- Previous Patent:Circuit substrate structure and c...   |  Next Patent:Voltage controlled oscillator ->