Fine resolution high speed linear delay element
AssigneeCiena Corporation
InventorsMahdi Parvizi, Sadok Aouini, Naim Ben-Hamida
Life of this patent
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Abstract
A controlled transconductance circuit (CTC) is disclosed. The CTC includes (i) a transistor comprising a drain terminal, a gate terminal, and a transistor source terminal, (ii) a biasing circuit element connected between the transistor source terminal and a CTC source terminal, and a variable capacitor connected between the transistor source terminal and a constant voltage terminal where the constant voltage terminal is adapted to receive a constant voltage, and (iii) a CTC control terminal adapted to control a transconductance of the CTC by controlling a capacitance of the variable capacitor.
Claims20
A controlled transconductance circuit (CTC), comprising:
- a transistor comprising a drain terminal, a gate terminal, and a transistor source terminal;
- a biasing circuit element connected between the transistor source terminal and a CTC source terminal;
- a variable capacitor connected between the transistor source terminal and a constant voltage terminal, wherein the constant voltage terminal is adapted to receive a constant voltage;
- and
- a CTC control terminal adapted to control a transconductance of the CTC by controlling a capacitance of the variable capacitor, the transconductance is utilized to set a propagation delay between the gate terminal and the drain terminal of the CTC.
A controlled transconductance circuit (CTC) method, comprising:
- providing a CTC comprising:
- a transistor comprising a drain terminal, a gate terminal, and a transistor source terminal;
- a biasing circuit element connected between the transistor source terminal and a CTC source terminal;
- a variable capacitor connected between the transistor source terminal and a constant voltage terminal, wherein the constant voltage terminal is adapted to receive a constant voltage;
- and
- a CTC control terminal adapted to control a transconductance of the CTC by controlling a capacitance of the variable capacitor, the transconductance is utilized to set a propagation delay between the gate terminal and the drain terminal of the CTC.
Dependencies are inferred from the claim text.