1. A continuous time \u0394\u03a3 modulator system with automatic timing adjustment comprising:
a loop filter including continuous time elements for receiving an input;
an ADC for sampling the output from said loop filter in response to an ADC clock;
a DAC responsive to the output from said ADC for feeding back an input to said loop filter in response to a DAC clock;
a timing measurement circuit for detecting a difference in the timing of the ADC sampling time and the DAC update time; and
a timing adjustment circuit, responsive to said timing measurement circuit, for adjusting the timing of at least one of said DAC and ADC clocks for aligning their respective update and sampling times.
2. The continuous time \u0394\u03a3 modulator system with automatic timing adjustment of claim 1 in which said loop filter also includes discrete time elements.
3. The continuous time \u0394\u03a3 modulator system with automatic timing adjustment of claim 1 in which said timing adjustment circuit includes a delay adjustment circuit responsive to a master clock and to said timing measurement circuit for adjusting the timing of the ADC clock.
4. The continuous time \u0394\u03a3 modulator system with automatic timing adjustment of claim 3 in which said timing adjustment circuit includes a coupling circuit for connecting said master clock to said DAC.
5. The continuous time \u0394\u03a3 modulator system with automatic timing adjustment of claim 4 in which said coupling circuit includes a fixed delay device.
6. The continuous time \u0394\u03a3 modulator system with automatic timing adjustment of claim 1 in which said timing measurement circuit includes a replica ADC, a replica DAC and a phase comparator for comparing the ADC sampling time with the DAC update time.
7. The continuous time \u0394\u03a3 modulator system with automatic timing adjustment of claim 6 in which said timing measurement circuit includes an adjustment control circuit responsive to said phase comparator for generating a control signal to drive said timing adjustment circuit.
8. The continuous time \u0394\u03a3 modulator system with automatic timing adjustment of claim 7 in which said adjustment control circuit includes a digital logic circuit.
9. The continuous time \u0394\u03a3 modulator system with automatic timing adjustment of claim 1 in which said timing measurement circuit includes a power monitoring circuit for detecting the power in frequency regions indicative of DACADC timing misalignment.
10. The continuous time \u0394\u03a3 modulator system with automatic timing adjustment of claim 9 in which said timing measurement circuit includes a comparator responsive to the power difference between said regions for indicating a misalignment of said DAC and ADC clocks.
11. The continuous time \u0394\u03a3 modulator system with automatic timing adjustment of claim 10 in which said timing measurement circuit includes an adjustment control circuit responsive to said comparator for generating a control signal to drive said timing adjustment circuit.
12. The continuous time \u0394\u03a3 modulator system with automatic timing adjustment of claim 11 in which said adjustment control circuit includes a digital logic circuit.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. Composition comprising as component A) a 1-imidazolylmethyl-substituted 2-naphthol compound of the general formula (I)
where
R1, R2, and R3 each independently of one another are H; C-1-17 alkyl; C3-12 cycloalkyl, optionally substituted by C1-4 alkyl groups; C4-20 cycloalkyl-alkyl, optionally substituted by C1-4 alkyl groups; C6-10 aryl, optionally substituted by 1-3 C1-4 alkyl groups; C7-15 phenylalkyl, optionally substituted by 1-3 C1-4 alkyl groups; C3-17 alkenyl; C3-12 alkynyl; or aromatic or aliphatic C3-12 acyl;
R4, R5, R6, R7, R8 and R9 each independently of one another are H; C1-12 alkyl; C3-12 cycloalkyl, optionally substituted by C1-4 alkyl groups; C4-20 cycloalkyl-alkyl, optionally substituted by C1-4 alkyl groups; C6-10 aryl, optionally substituted by 1-3 C1-4 alkyl groups; C7-15 phenylalkyl, optionally substituted by 1-3 C1-4 alkyl groups; C3-17 alkenyl; C3-12 alkynyl; C1-12 alkoxy; or OH; and
as component B) a phenol selected from the group consisting of 1,4-n-pentylphenol, n-hexylphenol, n-heptylphenol, n-octyphenol, n-decylphenol, and O,O\u2032 -diallyl-bisphenol A which is liquid at room temperature, with a weight ratio of component A) to component B) being from 30:70 to 70:30 and wherein the composition is a liquid.
2. Composition according to claim 1, wherein R1, R2 and R3 each independently of one another are H; C1-12 alkyl; phenyl; or C7-15 phenylalkyl, optionally substituted by 1-3 C1-4 alkyl groups.
3. Composition according to claim 2, wherein R2 and R3 are each H; and R1 is C1-12 alkyl; phenyl; or C7-15 phenylalkyl, optionally substituted by 1- 3 C1-4 alkyl groups.
4. Composition according to claim 3, wherein R2-9 are a hydrogen atom and R1 is C1-4 alkyl, or phenyl, optionally substituted by 1-3 C1-4 alkyl groups.
5. Composition according to claim 1, wherein component B) is O,O\u2032-diallyl-bisphenol A.
6. Curable composition comprising;
a) an epoxy resin whose epoxide content is from 0.1 to 11 epoxide equivalentskg;
b) from 5 to 40 parts by weight, based on the total weight of the curable composition, a liquid composition comprising a 1-imidazolylmethyl-substituted 2-naphthol compound of the general formula (I)
\u2003where
\u2003R1, R2, and R3 each independently of one another are H; C1-17 alkyl; C3-12 cycloalkyl, optionally substituted by C1-4 alkyl groups; C4-20 cycloalkyl-alkyl, optionally substituted by C1-4 alkyl groups; C6-10 aryl, optionally substituted by 1-3 C1-4 alkyl groups; C7-15 phenylalkyl, optionally substituted by 1-3 C1-4 alkyl groups; C3-17 alkenyl; C3-12 alkynyl; or aromatic or aliphatic C3-12 acyl;
\u2003R4, R5, R6, R7, R8 and R9 each independently of one another are H; C1-12 alkyl; C3-12 cycloalkyl, optionally substituted by C1-4 alkyl groups; C4-20 cycloalkyl-alkyl, optionally substituted by C1-4 alkyl groups; C6-10 aryl, optionally substituted by 1-3 C1-4 alkyl groups; C7-15 phenylalkyl, optionally substituted by 1-3 C1-4 alkyl groups; C3-17 alkenyl; C3-12 alkynyl; Cl-12 alkoxy; or OH; and
\u2003a phenol selected from the group consisting of 1,4-n-pentylphenol, n-hexylphenol, n-heptylphenol, n-octyphenol, n-decylphenol, and O,O\u2032-diallyl-bisphenol A which is liquid at room temperature, the weight ratio of the 1-imidazolylmethyl- substituted 2-naphthol compound to phenol being from 30:70:70:30;
c) a curing agent for the epoxy resin having from 0.5 to 1.5 functional groups per epoxide group; and optionally
d) one or more additives.
7. Composition according to claim 6, wherein the curing agent is an amine or polyamine.
8. Composition according to claim 7, characterized in that the curing agent is a polyoxypropylenediamine.
9. Composition according to claim 6, characterized in that the epoxy resin is a glycidyl ether, glycidyl ester, N-glycidyl or N,O-glycidyl derivative of an aromatic or heterocyclic compound, or a cycloaliphatic glycidyl compound.
10. A prepreg comprising a curable composition according to claim 6.
11. A method for making a curable composition comprising adding to an epoxy resin a curing agent, a liquid composition comprising a 1-imidazolylmethyl-substituted 2-naphthol compound of the general formula (I)
where
R1, R2, and R3 each independently of one another are H; C1-17 alkyl; C3-12 cycloalkyl, optionally substituted by C1-4 alkyl groups; C4-20 cycloalkyl-alkyl, optionally substituted by C1-4 alkyl groups; C6-10 aryl, optionally substituted by 1-3 C1-4 alkyl groups; C7-15 phenylalkyl, optionally substituted by 1-3 C1-4 alkyl groups; C3-17 alkenyl; C3-12 alkynyl; or aromatic or aliphatic C3-12 acyl;
R4, R5, R6, R7, R8 and R9 each independently of one another are H; C1-12 alkyl; C3-12 cycloalkyl, optionally substituted by C1-4 alkyl groups; C4-20 cycloalkyl-alkyl, optionally substituted by C1-4 alkyl groups; C6-10 aryl, optionally substituted by 1-3 C1-4 alkyl groups; C7-15 phenylalkyl, optionally substituted by 1-3 C1-4 alkyl groups; C3-17 alkenyl; C3-12 alkynyl; C1-12 alkoxy; or OH; and
a phenol selected from the group consisting of 1,4-n-pentylphenol, n-hexylphenol, n-heptylphenol, n-octyphenol, n-decylphenol, and O,O\u2032-diallyl-bisphenol A which is liquid at room temperature, the weight ratio of the 1-imidazolylmethyl-substituted 2-naphthol compound to phenol being from 30:70 to 70:30.