Variable gain amplifying circuit

Variable gain amplifying circuit

  • CN 100,590,965 C
  • Filed: 03/17/2004
  • Issued: 02/17/2010
  • Est. Priority Date: 03/17/2003
  • Status: Active Grant
First Claim
Patent Images

1. variable-gain amplification circuit is characterized in that comprising:

  • Signal generator possesses lead-out terminal, also can make output amplitude variable;

    Variable capacitance is connected between above-mentioned lead-out terminal and the earth terminal or is connected between the differential above-mentioned lead-out terminal, andControl circuit is controlled the output amplitude of above-mentioned signal generator and the capacitance of above-mentioned variable capacitance,Above-mentioned signal generator, portion has variable resistor at output load,Above-mentioned control circuit is side by side to above-mentioned variable capacitance and above-mentioned variable resistor controls so that the cut-off frequency of above-mentioned signal generator becomes constant.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×