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US 6,888,382 B2Granted
High speed track and hold amplifier for direct digital down-conversion
AssigneeBAE Systems Information and Electronic Systems Integration Inc.
InventorJames J. Komiak
Life of this patent
Estimating the term…
Abstract
An X-band capable track and hold amplifier capable of handling input frequencies of greater than 1 GHz, and as high as 15 GHz. The amplifier is built using a pseudomorphic high electron mobility transistor (PHEMT) process which gives high yield and uniformity.
Claims15
A method comprising the acts of:
- in an electronic circuit, generating a differential input from a single-end, 50 ohm input using a passive transformer balun having an RF bandwidth of between 2 GHz and 12 GHz;
- applying said differential input to an input of a track and hold amplifier implemented using at least one PHEMT in a microchip circuit;
- using a clock pulse to cause an output of the track and hold amplifier to alternately track and hold the input signal of the track and hold amplifier;
- and
- providing the output of the track and hold amplifier to an analog to digital converter circuit.
2 more elements
A circuit comprising:
- a track and hold amplifier having a differential input for receiving a microwave frequency signal and which is implemented in a monolithic microwave integrated circuit using at least one PHEMT;
- a passive transformer balun having an RF bandwidth of between 2 GHz and 12 GHz for generating a differential input from a single-ended, 50 ohm input;
- and
- a control circuit utilizing a clock pulse to enable an output of the track and hold amplifier to alternately track and hold said input to the track and hold amplifier.
1 more element
A high frequency track and hold amplifier electronic circuit having a track and hold amplifier, wherein the circuit is at least partially implemented in a monolithic microwave integrated circuit using at least one PHEMT comprising:
- a passive transformer balun having an RF bandwidth of between 2 GHz and 12 GHz to which a single-ended, 50 ohm unbalanced input signal is applied and from which a balanced signal may be taken;
- a control circuit utilizing a clock pulse to enable an output of the track and hold amplifier to alternately track and hold a microwave frequency signal to an input signal to the track and hold amplifier, and wherein the clock pulse is taken from the output of a limiting amplifier;
- and
- wherein the track and hold amplifier tracks said balanced input signal having a microwave frequency in the range of 1 GHz to 12 GHz.
1 more element
Dependencies are inferred from the claim text.