Dual voltage controlled oscillator using integrated transistor and negative differential resistance diode
AssigneeMotorola, Inc.
InventorsJun Shen, Vijay K. Nair
Life of this patent
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Abstract
A dual voltage controlled oscillator including a transistor with a negative differential resistance diode coupled to a first terminal and an inductance coupled to a second terminal. Operating voltages are applied to the gate and drain of the transistor to set the oscillator to operating in a negative differential resistance region of the diode. The diode, the inductance and the operating voltages are connected so that varying either of the operating voltages varies the frequency of the oscillations at the output.
Claims14
A dual voltage controlled oscillator comprising a three terminal transistor with a negative differential resistance diode coupled to a first terminal of the three terminal transistor and an inductance coupled to a second terminal of the three terminal transistor, two of the three terminals of the transistor having applied thereto operating voltages which set the oscillator to operating in a negative differential resistance region of the diode so that oscillations of a selected frequency are produced at an output terminal, and the transistor, the negative differential resistance diode, the inductance and the operating voltages being connected so that varying either of the operating voltages varies the frequency of the oscillations at the output.
A dual voltage controlled oscillator comprising a transistor having gate, drain and source terminals, a negative differential resistance diode coupled to the source terminal of the transistor, an inductance coupled to the drain terminal of the transistor, and operating voltages which set the oscillator to operating in a negative differential resistance region of the diode connected to the gate terminal and through the inductances to the drain terminal so that oscillations of a selected frequency are produced at an output terminal, and varying either of the operating voltages varies the frequency of the oscillations at the output.
A dual voltage controlled oscillator comprising a transistor having gate, drain and source terminals, a negative differential resistance diode coupled to the gate terminal of the transistor, a first inductance coupled to the gate terminal of the transistor, a second inductance coupled to the drain terminal of the transistor, and operating voltages which set the oscillator to operating in a negative differential resistance region of the diode connected through the first and second inductances to the gate and drain terminals respectively so that oscillations of a selected frequency are produced at an output terminal, and varying either of the operating voltages varies the frequency of the oscillations at the output.
A method of operating a dual voltage controlled oscillator comprising the steps of:
- providing a three terminal transistor with a negative differential resistance diode coupled to a first terminal of the three terminal transistor and an inductance coupled to a second terminal of the three terminal transistor;
- coupling operating voltages to the transistor which set the oscillator to operating in a negative differential resistance region of the diode so that oscillations of a selected frequency are produced at an output terminal;
- and
- varying either of the operating voltages to vary the frequency of the oscillations at the output.
Dependencies are inferred from the claim text.