Amplification phase correction in a pulse burst
An apparatus includes a circuit and a shifter. The circuit may be configured to generate a control signal based on a reference voltage and a plurality of characteristics of an amplifier. The shifter may be configured to (i) receive an input signal carrying a pulse burst having a plurality of pulses, (ii) shift a plurality of phases of the pulses in the pulse burst in response to the control signal, and (iii) present the pulses as shifted in an output signal.
1. An apparatus comprising:
a circuit configured to generate a control signal based on a reference voltage and a plurality of characteristics of an amplifier; and
a shifter configured to (i) receive an input signal carrying a pulse burst having a plurality of pulses, (ii) shift a plurality of phases of said pulses in said pulse burst in response to said control signal, and (iii) present said pulses as shifted in an output signal.
2. The apparatus according to claim 1 , wherein the circuit is configured to adjust said control signal in at least one of duration, amplitude, and timing.
3. The apparatus according to claim 1 , wherein at least one of a duration of said control signal is controlled by a first configuration signal received by said circuit, an amplitude of said control signal is controlled by a second configuration signal received by said circuit, and a timing of said control signal is controlled by a third configuration signal received by said circuit.
4. The apparatus according to claim 1 , wherein said circuit is further configured to clamp said control signal to a constant value after a predetermined number of said pulses.
5. The apparatus according to claim 1 , wherein said shifter uniquely shifts each of said phases of said pulses in said pulse burst.
6. The apparatus according to claim 1 , wherein said shifter maintains an amplitude of said pulses from said input signal to said output signal.
7. The apparatus according to claim 1 , wherein said shifter adjusts said phases of said pulses by varying a voltage across a plurality of diodes using said control signal.
8. The apparatus according to claim 1 , wherein said circuit and said shifter form part of an amplifier circuit that operates in one or more of a super high frequency range and an extremely high frequency range.
9. A method for amplification phase correction in a pulse burst, comprising the steps of:
generating a control signal in a circuit based on a reference voltage and a plurality of characteristics of an amplifier;
receiving an input signal carrying a pulse burst having a plurality of pulses;
shifting a plurality of phases of said pulses in said pulse burst in response to said control signal; and
presenting said pulses as shifted in an output signal.
10. The method according to claim 9 , further comprising the step of:
adjusting said control signal in at least one of duration, amplitude, and timing.
11. The method according to claim 9 , wherein at least one of a duration of said control signal is controlled by a first configuration signal received by said circuit, an amplitude of said control signal is controlled by a second configuration signal received by said circuit, and a timing of said control signal is controlled by a third configuration signal received by said circuit.
12. The method according to claim 9 , further comprising the step of:
clamping said control signal to a constant value after a predetermined number of said pulses.
13. The method according to claim 9 , wherein each of said phases of said pulses in said pulse burst is uniquely shifted.
14. The method according to claim 9 , wherein an amplitude of said pulses is maintained from said input signal to said output signal.
15. The method according to claim 9 , wherein said phases of said pulses are adjusted by varying a voltage across a plurality of diodes using said control signal.
16. The method according to claim 9 , wherein said steps are implemented in an amplifier circuit that operates in one or more of a super high frequency range and an extremely high frequency range.
17. An apparatus comprising:
a circuit configured to (i) generate an input signal carrying a pulse burst having a plurality of pulses, (ii) shift a plurality of phases of said pulses in said pulse burst in response to a control signal in a first mode, (iii) bypass said shifts in a second mode, and (iv) present said pulses in an intermediate signal to an amplifier; and
an analyzer configured to determine a plurality of characteristics of said amplifier based on an output signal generated by said amplifier.
18. The apparatus according to claim 17 , wherein said circuit comprises a function generator configured to generate said control signal and a trigger signal that starts said pulse burst.
19. The apparatus according to claim 17 , wherein said circuit further comprises a pulse modulator configured to generate said input signal.
20. The apparatus according to claim 17 , wherein said circuit comprises a filter circuit configured to modify said control signal prior to said shifts of said phases of said pulses in said pulse burst.