Voltage controlled saw oscillator
First Claim
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1. An oscillator comprising:
- an integrated circuit comprising;
a phase shifting network, andan amplifier connected to said phase shifting network; and
a resonator having an input port and an output port connected as a feedback element around said integrated circuit, wherein said phase shifting network comprises a multiplier having an input terminal and an output terminal, a first transconductance amplifier connected in circuit to said output terminal of said multiplier, and a second transconductance amplifier and a third transconductance amplifier connected in series and in circuit in parallel to said multiplier and said first transconductance amplifier.
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Abstract
A voltage controlled surface acoustic wave oscillator includes an integrated circuit and a two port resonator connected as a feedback element around the integrated circuit. The integrated circuit includes a phase shifting network and an amplifier directly connected to the phase shifting network.
24 Citations
5 Claims
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1. An oscillator comprising:
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an integrated circuit comprising; a phase shifting network, and an amplifier connected to said phase shifting network; and a resonator having an input port and an output port connected as a feedback element around said integrated circuit, wherein said phase shifting network comprises a multiplier having an input terminal and an output terminal, a first transconductance amplifier connected in circuit to said output terminal of said multiplier, and a second transconductance amplifier and a third transconductance amplifier connected in series and in circuit in parallel to said multiplier and said first transconductance amplifier. - View Dependent Claims (2, 3)
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4. A voltage controlled surface acoustic wave ("SAW") oscillator comprising:
an integrated circuit formed on an insulative substrate which includes an amplifier having a pair of input terminals, an output terminal, a first signal output terminal, and a second signal output terminal, a phase shift network having a first input, a second input and a pair of phase shifted outputs, said outputs being connected to the pair of inputs of said amplifier, and a SAW transversal coupled filter having an input terminal, an output terminal, and a common ground terminal, said input terminal of said SAW transversal coupled filter connected to the output terminal of said amplifier, said output terminal of said transversal coupled filter connected to the second input of said phase shift network and to an inductor, and said common ground terminal connected in circuit to a point between said inductor and said first input of said phase shift network, wherein said phase shifting network comprises a multiplier having an input terminal and an output terminal, a first trans conductance amplifier connected in circuit to said output terminal of said multiplier, and a second transconductance amplifier and a third transconductance amplifier connected in series and in circuit in parallel to said multiplier and said first transconductance amplifier. - View Dependent Claims (5)
Specification