robin/two_pole_dc_pass
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first attempt at zg. Did not make much difference although increased the

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gain. Perhaps the zeros needs to be closed in frequency to the dc line
These ones were at 7/8 which is 29 degrees approx.
Probably not enough to make a real difference.
This commit is contained in:
Robin. P. Clark 2019-09-10 09:42:57 +01:00
parent ce997c0cc7
commit 2647f7e4d4
2 changed files with 5 additions and 2 deletions
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2
tp.gpt
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@ -3,7 +3,7 @@
#plot "tp.dat" using 1:3 title "input", "tp.dat" using 1:5 title "two pole", "tp.dat" using 1:6 title "34LAG", "tp.dat" using 1:7 title "78LAG" #plot "tp.dat" using 1:3 title "input", "tp.dat" using 1:5 title "two pole", "tp.dat" using 1:6 title "34LAG", "tp.dat" using 1:7 title "78LAG"
#plot "tp.dat" using 1:3 title "input" with linespoints, "tp.dat" using 1:5 title "two pole" with linespoints, "tp.dat" using 1:7 title "78LAG" with linespoints, "tp.dat" using 1:9 title "78LAG TWICE" with linespoints, "tp.dat" using 1:11 title "two pole 15 16" #plot "tp.dat" using 1:3 title "input" with linespoints, "tp.dat" using 1:5 title "two pole" with linespoints, "tp.dat" using 1:7 title "78LAG" with linespoints, "tp.dat" using 1:9 title "78LAG TWICE" with linespoints, "tp.dat" using 1:11 title "two pole 15 16"
plot "tp.dat" using 1:3 title "input" with linespoints, "tp.dat" using 1:5 title "two pole" with linespoints, "tp.dat" using 1:11 title "two pole 15 16" with linespoints, "tp.dat" using 1:13 title "zero only" with linespoints plot "tp.dat" using 1:3 title "input" with linespoints, "tp.dat" using 1:5 title "two pole" with linespoints, "tp.dat" using 1:11 title "two pole 15 16" with linespoints, "tp.dat" using 1:13 title "zero only" with linespoints
plot "tp.dat" using 1:3 title "input" with linespoints, "tp.dat" using 1:5 title "two pole" with linespoints, "tp.dat" using 1:15 title "zero only^2" with linespoints, "tp.dat" using 1:17 title "zero only^3" with linespoints,"tp.dat" using 1:19 title "zero only^4" with linespoints plot "tp.dat" using 1:3 title "input" with linespoints, "tp.dat" using 1:5 title "two pole" with linespoints, "tp.dat" using 1:15 title "7 8 two pole ZG" with linespoints, "tp.dat" using 1:17 title "zero only^3" with linespoints,"tp.dat" using 1:19 title "zero only^4" with linespoints
!sleep 10 !sleep 10
!sleep 10 !sleep 10

5
two_pole_7_8.c
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@ -80,6 +80,9 @@ two_pole_7_8 ( int16_t input ) {
} }
// Added zero guard. tried a pair of zeros near unit circle
// 7/8 in ADJ, i.e hyp = 1 so on unit circle.
//
int16_t /* squared version of LAG_7_8 */ int16_t /* squared version of LAG_7_8 */
two_pole_7_8_zg ( int16_t input ) { // with zero guard two_pole_7_8_zg ( int16_t input ) { // with zero guard
@ -287,7 +290,7 @@ int main () {
zo2 = zero_only_2 (val); zo2 = two_pole_7_8_zg(val); // zero_only_2 (val);
zo3 = zero_only_3 (val); zo3 = zero_only_3 (val);
zo4 = zero_only_4 (val); zo4 = zero_only_4 (val);