Delay pulse generating circuit
AssigneeTakeda Riken Co., Ltd.
InventorKenji Yoshida
Life of this patent
Estimating the term…
Abstract
A delay signal generating circuit includes feedback loops and components for selectively setting the delay time of a delay unit in one of the loops. The circuit can be used to provide an adjustable delay to a signal being propagated therethrough, and the delay unit can be bypassed.
Claims18
A delay circuit for transmitting a pulse with a selectable delay between input and output terminals thereof, said circuit comprising
- a signal line connecting between said input and output terminals, along which the pulses to be delayed are transmitted,
- a delay unit connected in said signal line, the delay time of said delay unit being variable to provide said selectable delay between said input and output terminals,
- a bypass line connected in parallel with a portion of said signal line which includes said delay unit, to selectively allow pulses provided to said signal line to bypass said portion of said delay line including said delay element,
- feedback means for feeding back pulses corresponding to pulses at said output terminal to said signal line at a point that is no further along said signal line than the input to said portion of said signal line
- switching means for switching the feedback pulses between said portion of said signal path and said bypass line, for transmitting the feedback pulses to said output terminal,
- operating means for controlling said feedback means and switching means, and for adjusting said delay time of said delay unit, wherein said selected delay is provided based on comparison of the periods for repeated transmission of respective pulses from said output terminal via said feedback means and along each of said portion of said signal line and said bypass line.
A delay circuit for selectively transmitting a pulse along two alternate paths from an input terminal of said circuit to an output terminal thereof, with a selected delay time along a first one of said alternate paths with respect to transmission along the second alternate path, said circuit comprising
- an adjustable delay unit located in said first alternate path,
- feedback connection means for feeding back a pulse on said output terminal to a further terminal corresponding to said input terminal for alternately forming a feedback loop with each of said alternate paths to cause oscillation of said circuit with a respective frequency for each said alternate path,
- switching means for alternately forming said feedback loop with each of said alternate paths, and
- means for determining a difference corresponding to the difference of the two respective frequencies and for adjusting said adjustable delay unit to cause said difference to change to provide a desired value for said delay time of the delay circuit.
Dependencies are inferred from the claim text.