Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
180 words
A variable delay circuit comprising: a plurality of cascade-connected delay stages, each including a path passing through a delay element, a path not passing therethrough, and a selector for selecting one of them, said selectors of said delay stages being controlled by corresponding bits of control data to vary a composite delay of said cascade-connected delay stages; main conversion table means whereby set data of an intended delay is converted to control data which provides said composite delay closest to said intended delay corresponding to said set data at a first ambient temperature; corrected conversion table means wherein predicted delays at a second ambient temperature, different from said first ambient temperature by a predetermined value are stored, the predicted delays being the closest to said intended delay corresponding to each piece of said set data corresponding to said composite delay for said control data at said first ambient temperature; and temperature detection/control means which detects ambient temperature and outputs a select control signal for selecting control data from either said main conversion table means and said corrected conversion table means.
Claim 2
Dependent Claim
180 words
A variable delay circuit comprising: a plurality of cascade-connected delay stages, each including a path passing through a delay element, a path not passing therethrough, and a selector for selecting one of them, said selectors of said delay stages being controlled by corresponding bits of control data to vary a composite delay of said cascade-connected delay stages; main conversion table means whereby set data of an intended delay is converted to control data which provides said composite delay closest to said intended delay corresponding to said set data at a first ambient temperature; corrected conversion table means wherein predicted delays at a second ambient temperature, different from said first ambient temperature by a predetermined value are stored, the predicted delays being the closest to said intended delay corresponding to each piece of said set data corresponding to said composite delay for said control data at said first ambient temperature; and temperature detection/control means which detects ambient temperature and outputs a select control signal for selecting control data from either said main conversion table means and said corrected conversion table means.
Claim 3
Dependent Claim
63 words
The variable delay circuit of claim 1 wherein said corrected conversion table means includes a first corrected conversion table for the case where said second ambient temperature is higher than said first ambient temperature by said predetermined value and a second corrected conversion table for the case where said second ambient temperature is lower than said first ambient temperature by said predetermined value.
Claim 4
Dependent Claim
33 words
The variable delay circuit of claim 1 wherein said main conversion table means and said corrected conversion table means are formed as a plurality of memories which have stored therein respective conversion tables.
Claim 5
Dependent Claim
50 words
The variable delay circuit of claim 1 wherein said main conversion table means and said corrected conversion table means are stored in one memory and the detected output of said temperature detection/control means is used as a high order bit of an address to specify one of said table means.
Claim 6
Dependent Claim
32 words
The variable delay circuit of claim 2 wherein said main conversion means and said corrected conversion table means are formed as a plurality of memories which have stored therein respective conversion tables.
Claim 7
Dependent Claim
50 words
The variable delay circuit of claim 2 wherein said main conversion table means and said corrected conversion table means are stored in one memory and the detected output of said temperature detection/control means is used as a high order bit of an address to specify one of said table means.